Winnebago Adventurer 2023 PLUMBING User Manual

PLUMBING

FRESH WATER SYSTEM

The Fresh Water System provides water to the galley sink, shower, bathroom lavatory, toilet, and water heater.

Water may be supplied by either of two sources:

1. A fresh water tank and water pump located within the motorhome, or
2. Any external fresh water source to which the motorhome may be connected, known as “city water”.
3. There are two ways to fill the fresh water tank on your motorhome – City Fill or Gravity Fill.

Water Pressure Regulators

Because city water pressure varies from location to location, we recommend obtaining an in-line water pressure regulator to prevent damage to any components, connections, and seals in your fresh water system. These devices simply connect in-line between the supply hose and the city water input on the motorhome. We recommend regulators that control water pressure to 50 psi. max. Water pressure regulators are commonly available at most RV dealerships and many large retail discount or home supply centers.

Method 1 – Filling the Fresh Water Tank Through City Fill Connection

WARNING
Potable water only. Sanitize, flush, and drain water tank before using. See owner’s manual for instructions, care, and maintenance information. Failure to maintain tank can result in death or serious injury.

Always fill the fresh water tank at an approved potable water filling facility or a known purified drinking water source. The tank is filled through the City Water Connection (Fresh Water Inlet) located inside the water service center. The Fresh Water valve (located in the water service center) routes the water from the city water hose to the fresh water tank for filling.

1. Attach hose to the Fresh Water Inlet.

Fresh (City) Water Connection
“Fresh Water Inlet”
(Located in the water service center)
-Typical View

• Open the Gravity Fill door (located behind a small, lockable door on the driver or passenger sidewall or backwall – depending on model) to aid in tank venting and as an overflow when the tank is full.

Water Tank Gravity Fill
-Typical View

Turn the Fresh Water valve to the Tank Fill position.
Fresh Water Valve
(Located in water service center)
-Typical View

•  Turn city water supply ON.
•  Use the level display on the monitor panel to oversee filling of the tank, or when the tank is full, water will flow from tank vent tube beneath the motorhome and out of the Gravity Fill door.

NOTICE
Do not leave fresh water connection unattended when filling tank. Failure to comply may result in tank expansion and property damage.

1.  Turn OFF city water supply and disconnect hose from the Fresh Water Inlet.
2. Turn the Fresh Water valve to Normal position to use the water pump. The Tank Fill position is only for pressure filling the water tank from the city water hose connection.

Fresh Water Valve
(Located in water service center)
-Typical View

Using City Water
When connected to an outside source of water, the water bypasses the water pump and storage tank and supplies pressure directly to individual faucets and toilet. A check valve built into the pump prevents water from entering the pump and filling the storage tank.

• Connect hose to Fresh Water Inlet as described in previous steps.
• With the Fresh Water valve in the Normal position, turn the Water Pump switch(es) OFF.

NOTE: Always keep the Fresh Water valve in Normal position unless you are filling the tank. If this valve is left in the Tank Fill position while using the city water, water will keep flowing into the tank and out the tank vent tube onto the ground and the water pump will run without delivering water to the faucets.

Disconnecting from City Water

1. Turn the city water supply OFF.
2. Open a faucet on the motorhome (such as the exterior wash station, if equipped) to relieve line pressure.
3. Disconnect hose from the motorhome and replace cap on the Fresh Water Inlet.

NOTE: Ensure the Fresh Water valve is in NORMAL position to use the water pump. If the valve is in Tank Fill position, the pump will run continuously without delivering water.

Method 2 – Filling the Fresh Water Tank Through Gravity Fill –If Equipped

WARNING
Potable water only.
Sanitize, flush, and drain water tank before using.
See owner’s manual for instructions, care, and maintenance information. Failure to maintain tank can result in death or serious injury.

Always fill the fresh water tank at an approved potable water filling facility or a known purified drinking water source. The gravity tank fill tube is located behind a small, lockable door on the driver or passenger sidewall or backwall toward the back of the motorhome, depending on model.

Water Tank Gravity Fill
-Typical View

• Insert hose into fill opening and turn water supply on. Tank is full when water flows from the tank vent tube beneath the motorhome and out of the Gravity Fill door.
• Using Tank Water (Gravity Fill)
• Turn Water Pump switch ON. While the switch is on, the water pump will automatically supply tank water as needed.

WATER PUMP

When your motorhome is not connected to a city water supply, water is supplied from the fresh water tank by a water system demand pump. A demand pump is designed to run only when you are using water. When you open a faucet, the waterline pressure drops and the pump begins to run, and it will continue to run as long as the faucet is open. When you close the faucet, the line pressure backs up to the pump, and it shuts itself off. The pump is self-priming and will run briefly to build up line pressure when the Water Pump switch is first turned on. See “Initial Waterline Priming” for instructions on using the water system for the first time.

Water Pump Strainer
The pump is equipped with a cleanable strainer to capture any possible tank-borne particles that could damage pump components.

NOTE: We recommend that you check and clean the strainer after each tankful of water during the first few uses of the Water Pump system. Thereafter, remember to check it at least yearly, and be sure to empty water from it if using the blowout winterization procedure.

Water Pump Strainer
-Typical View

To Clean Pump Strainer

1. Ensure all Water Pump switches are OFF.
2. Twist the inlet cap (bowl) “counter-clockwise” to unscrew from the strainer assembly.
3. Remove the bowl and pull the strainer screen out of the bowl to tap out any particles and rinse clean.
4. Insert the strainer screen back into the bowl, then screw the bowl back onto the strainer assembly.

Water Pump Switch

The Water Pump switch is located on the monitor panel (some models may have an additional switch in the water service center, near the exterior shower, or within the bathroom area for your convenience). While the switch is “ON”, the pump will automatically supply water as it is needed. Do not leave the pump on while away from your motorhome or while driving. In time, a slow leak in a faucet could drain the water tank, fill the holding tank, and discharge the house batteries.

Initial Waterline Priming

1. Ensure that all water drain valves are closed, including water heater valve.
2. Turn Water Pump switch to “OFF” position.
3. Fill water tank.
4. Open all faucets, hot and cold.
5. Turn ON the Water Pump switch.
6. Close each faucet as it begins to deliver a steady stream of water (close cold water first). Leave hot water faucets on until they also deliver a steady stream of water. This will ensure that the water heater is filled with water.
7. Check to ensure the Water Pump stops soon after all faucets have been closed.
8.  The Water Pump is now ready for automatic operation. The pump will start when a faucet is opened and stop when the faucet is closed.

Further Information

Refer to the Water Pump manufacturer’s operation, care, and maintenance information provided in your Info Case.

Water Pump
-Typical installation shown
(Located inside utility compartment (rear
driver side compartment).

FULL-COACH WATER FILTRATION SYSTEM

The full-coach water filtration system is connected to the cold water lines throughout the motorhome. It uses a flow-through filter that removes chlorine, cloudiness, and sediments, resulting in clear, odorless and taste-free clean water for drinking, cooking, and personal care.

Full-Coach Water Filter System
(Located in water service center)
-Typical View

Replacing the Full-Coach Water Filtration Cartridge

Replace the filter cartridge after 1,000 gallons of usage or sooner if water flow from faucets is noticeably reduced.

1. Turn off the water supply and relieve water line pressure by opening a faucet.
2. Remove the filter canister from the filter head. Use the filter wrench supplied to loosen the filter canister.
3. Unscrew the canister from the filter head.(There will be water inside the canister).
4. Remove the large O-ring seal from the canister. Check seal for damage, wipe clean, and set aside. Discard the used filter cartridge.
5. Wash the inside of the canister with dish soap and warm water using a nonabrasive sponge or cloth. Rinse thoroughly.
6. Fill canister about 1/3 with clean water and add a couple of tablespoons of household bleach, then scrub with a sponge or brush to disinfect. Rinse thoroughly.
7. Lubricate the O-ring with clean silicone grease to ensure a proper watertight seal, then place back into the groove at the bottom of the canister threads.
   NOTE: The O-ring should be replaced every third cartridge change to ensure proper sealing. See your dealer for replacement cartridges and O-rings.
8. Insert a new filter cartridge into the canister, then hand tighten the canister securely onto the filter head. DO NOT OVER-TIGHTEN.
9. Turn the Fresh Water Valve to Normal position. Next open a faucet inside the motorhome or the exterior shower, then turn city water on SLOWLY to allow the canister to fill with water.
   Thoroughly flush the filtration system by running the water for twenty (20) minutes.
10. Check for leaks.
    See “Winterizing Procedure” in this section to prepare the water filtration system for freezing conditions.

DISINFECTING YOUR FRESH WATER SYSTEM

(As required by NFPA®1192 Standard on Recreational Vehicles)
To ensure complete disinfection of the potable water system, it is recommended that the following procedure be followed on a new system, one that has not been used for a period of time, or one that could have become contaminated. This procedure is also recommended before long periods of storage, such as over winter.

Disinfecting with Gravity Fill –If Equipped

1. Prepare a chlorine solution using 1 gallon of water and 1/4 cup of household chlorine bleach (sodium hypochlorite solution). With tank empty, pour chlorine solution into the tank through the gravity fill port. Use 1 gallon solution for each 15 gallons of tank capacity. This procedure will result in a residual chlorine concentration of 50 ppm in the water system.
   NOTE: If a 100 ppm concentration is desired, use 1/2 cup of household bleach with 1 gallon of water to prepare the chlorine solution. One gallon of this solution should be used for each 15 gallons of tank capacity.
2. WARNING
   Chlorine is poisonous. Do not misuse. Recap bottle and clean all utensils after use. Complete filling of tank with fresh water.
3. Open each faucet in the motorhome and run the water until a distinct odor of chlorine can be detected in the water discharged. Do not forget the hot water faucets.
4. Let the system stand at least 4 hours when disinfecting with 50 ppm residual chlorine. (If a shorter time period is desired, then a 100 ppm chlorine concentration should be allowed to stand in the system for at least 1 hour).
5. Drain the water tank and refill with fresh water.
6. Open each faucet again and run fresh water to flush chlorinated water from the lines. Run the water until there is no odor of chlorine detected in the water discharged. Do not forget the hot water faucets. (You may need to leave a hot water faucet open for some time to flush the water heater with clean water. You may also want to turn the water heater off until this is done to avoid wasting energy trying to heat “unused” water).
7. Water system is now disinfected.

Disinfecting with City Water Fill

When disinfecting through the city water fill, an external cartridge-type water filter assembly must be connected in-line between the city water hose and the city water fill to add disinfecting solution to the tank. These filters are commonly available at most RV supply stores.
NOTE: If you do not have an in-line cartridge filter, see City Water Hose/Tank Disinfection following this procedure for an alternate method of adding bleach solution to your tank.

1. Remove the filter cartridge and pour 1/4 cup of household chlorine bleach (sodium hypochlorite solution) for each 15 gallons of tank capacity into the empty filter canister, then screw the canister back onto the filter base.
   WARNING
   Chlorine is poisonous. Do not misuse. Recap bottle and clean all utensils after use.
   This solution will result in a residual chlorine concentration of approximately 50 ppm in the water system. (If a 100 ppm concentration is desired, use 1/2 cup of household bleach for each 15 gallons of tank capacity). The bleach will be drawn into the tank when the city water is turned on and the Fresh Water valve is turned to Tank Fill position.
   Fresh Water Valve (Located in water service center)
2. Fill the tank completely, then open each faucet in the motorhome and run the water until a distinct odor of chlorine can be detected in the water discharged. Do not forget the hot water faucets.
3.  Let the system stand at least 4 hours when disinfecting with 50 ppm residual chlorine. (If a shorter time period is desired, then 100 ppm chlorine concentration should be allowed to stand in the system for at least 1 hour).
4. Drain the fresh water tank.
5. Install the filter cartridge into the filter canister, then refill the tank with fresh water.
6. Open each faucet again and run fresh water to flush chlorinated water from the lines. Run the water until there is no odor of chlorine detected in the water discharged. Do not forget the hot water faucets.
   (You may need to leave a hot water faucet open for some time to flush the water heater with clean water. You may also want to turn the water heater off until this is done to avoid wasting energy trying to heat “unused” water).
7. Water system is now disinfected.

City Water Hose/Tank Disinfection

As an alternative way to disinfect your tank, connect a city water hose to your motorhome and pour the bleach into the other end of the hose using a funnel. Hold the hose upright to avoid draining the bleach. Connect the hose to a city water hydrant to force the bleach into the tank and fill the tank with water.
This method has the additional benefit of disinfecting the city water hose at the same time.

Continuous Tank Disinfection (superchlorination)

Some Rivers like to ensure continuous sanitation of their fresh water tank by “Superchlorination”– maintaining an effective low level of chlorine in the tank at all times.
Add 1 teaspoon of household chlorine bleach (sodium hypochlorite) to your tank for each 10 gallons of tank capacity. When you fill the tank, this will result in a 6.7 ppm level of chlorine, which should kill harmful bacteria and slime-forming organisms. Chlorine may be removed from drinking water by the cold water filter at the galley faucet (if equipped) or by installing an activated carbon water purifier at the galley sink cold water line or a separate drinking water faucet with filter. Superchlorination does not affect city water usage, only the fresh water tank.

SHOWER HOSE VACUUM BREAKER

After using the shower, you may notice water dripping from the shower faucet assembly. The dripping results when vacuum in the shower hose (after closing the shower faucet) slowly releases and allows water remaining in the hose to drain down. This is a normal function of the shower valve assembly and is not a leak or defect. If items are placed into the shower tub before shower valve vacuum release is complete, they may become wet.

EXTERIOR SHOWER/WASH STATION

The Exterior Shower/Wash Station feature allows you to do things such as rinse off sand or salt after a swim, rinse off muddy boots, or bathe your pet outside the motorhome. Some models may have a Water Pump switch located near the shower faucet for convenience.

Exterior Shower/Wash Station
-Typical View

TOILET

The toilet in your motorhome is very similar to the household type, except that it is designed to use only a small amount of water per flush. It uses a high velocity jet of water, producing a swirl effect, to efficiently cleanse the bowl.

Important “Don’ts”

1. Don’t use facial tissue or regular toilet tissue in the RV toilet. These will not disintegrate sufficiently and will often cling to the sides of the holding tank. Toilet tissue made specifically for use in RV toilets and holding tanks is available at most RV supply centers.
2. Don’t dispose of sanitary napkins or other non-dissolving items in the toilet.
3. Don’t put automotive antifreeze or caustic chemicals, such as laundry bleach or heavy detergents into the toilet or holding tank. These products may damage plastic or rubber parts in the system .See winterizing instructions at the end of this section to prepare the toilet for storage in freezing conditions.

Further Information
See the toilet manufacturer’s operation information in your Info Case for complete operating, care, and maintenance information.

DRAINAGE SYSTEM (P-TRAPS)

Ensure there is an adequate amount of water in the drainage system p-traps to avoid sewer odor from entering your motorhome. If you should experience a sewer odor, pour approximately 1 cup of water down each sink and shower drain in the motorhome.

WASTEWATER SYSTEM

(Holding Tanks)
The drainage system is self-contained and uses two separate holding tanks to contain the waste water until it can be dumped at an appropriate waste water disposal site. This means you can use the toilet(s), sinks, and shower even in areas where utility hookups are not available. The black water holding tank(s) contains the sewage from the toilet(s) and may include bathroom lavatory on some models. The gray water holding tank contains the wastewater from the galley sink and shower, and may include bathroom lavatory. If equipped with the tailgate package, your coach uses a separate holding tank for the tailgate package sink. This 10-gallon tank is drained to the primary gray tank via a 12-volt transfer pump. See “Specifications” in Section 1 – Introduction for tank capacities for your model.

Dumping Holding Tanks

1. Remove sewage drain hose from water service center.
2. Remove dust cap from sewage drain outlet and connect sewage drain hose. Be sure it is firmly attached.

Holding Tank Drain Valves
(Located in water service center)
-Typical View

Black and Gray Waste Tank Drain Valve positions may be reversed, depending on floorplan and tank location.

NOTE: The sewage drain outlet swivels downward (on certain models) when necessary to avoid bends in the sewage drain hose, which could trap solids while dumping, or to provide more direct drainage while using on-site sewer hookups.

• Place the outlet end of sewage drain hose into disposal opening. Open the Black Waste Tank Drain Valve with a quick pull and make sure there are no sags in the hose. Move the hose gently about to dislodge any waste and ensure complete drainage. Close Black Waste Tank Drain Valve as soon as tank is empty.

1. 1st – Pull Black Waste Tank Drain Valve to drain Black Water (sewage) Tank, then close.
2. 2nd – Pull Gray Waste Tank Drain Valve to drain Gray Water (sink/shower) Tank, then close.
   – Typical View
   NOTE: DO NOT OPEN BOTH VALVES AT ONCE. Do not open the Gray Waste Tank Drain Valve until the black tank is drained and Black Waste Tank Drain Valve closed to avoid sewage back-up into gray tank. Gray water also rinses any black water solids from the sewage drain hose.
3.  Open the Gray Waste Tank Drain Valve. Be sure there are no sags in the hose to ensure complete drainage. Close Gray Waste Tank Drain Valve as soon as tank is empty.
4. Add an odor control chemical to the sewage holding tank through the toilet(s). These chemicals are available at most RV supply centers.
5. Rinse sewage drain hose thoroughly with water before stowing.

NOTE: We recommend that you dump all holding tanks before traveling to avoid carrying unnecessary weight.

Flushing your Black Water Holding Tank

The black water holding tank is equipped with an internal spray head that allows you to rinse the inside of the tank with a shower of clean water after dumping.

CAUTION
Do not use the tank flush valve unless the full way termination valve is in the open position. May result in an unsanitary condition leading to illness or personal injury.

Dump your black water holding tank in the usual manner at approved sewage disposal station.
Leave Black Waste Tank Drain valve open while flushing tank. Attach a garden hose from a city water hydrant to the Black Waste Tank Flush Inlet fitting in the water service center. (This inlet is clearly marked separate from the City Water inlet).
Black Waste Tank Flush Inlet (Located in water service center)
-Typical View

1. Turn the water on to begin flushing. Allow water to run for about three minutes.
2. Disconnect hose from flushing system and close Black Waste Tank Drain valve.

Using On-Site Sewer Hook-Ups

The sewage drain hose may remain attached to the sewage drain outlet and be routed out the bottom of the compartment while the motorhome is parked and connected to an on-site sewage hook-up.

WARNING
Service inlet access must be closed when utility connections are not in use.
When using a sewer hook-up, keep the dump valves closed until a tank becomes full or when preparing to leave the site. This keeps the solids in suspension, allowing them to be carried out with the liquids when the dump valve is opened. If the valve is left open, the liquids will drain off, leaving solids in the tank. Should this accidentally happen, disconnect the hose, fill the tank about half full with water, and drive a few miles to dislodge the solids. A few starts and stops will aid in the process. Then reconnect the hose and drain in the normal manner.

NOTE: Always keep the sewage drain outlet capped while sewage connection is not in use.

Holding Tank Level Indicators
See “Systems Monitor Panel” in Section 4 – Appliances for further information on the monitor panel and checking tank levels.
See “Specifications” in Section 1 – Introduction for tank capacities for your model.

WASTE WATER SYSTEM (WASTE PUMP) (Holding Tanks)

The drainage system is self-contained and uses three separate holding tanks to contain the wastewater until it can be dumped at an appropriate wastewater disposal site. This means you can use the toilets, sinks, and shower even in areas where utility hookups are not available. The two black water holding tanks contain the sewage from the toilets. The gray water holding tank typically contains the waste water from the galley sink, shower, and bathroom lavatories. See “Specifications” in Section 1–Introduction for tank capacities for your model.

Waste Pump

The 12-volt Waste Pump disposes black holding tank waste (for the front toilet) through a small diameter sewer hose, which is then drained through the main sewage drain outlet.

Waste Pump
(Located in passenger side compartment ahead of rear axle)
-Typical installation shown

NOTE: If Waste Pump stalls, check breaker in the load center. If problem persists, remove end cap and manually turn pump shaft (located on the end of the waste pump) with a screwdriver.

Further Information
For complete operating instructions and troubleshooting tips, see the Waste Pump manufacturer’s user guide provided in your Info Case.

Dumping Holding Tanks

1. Remove sewage drain hose from water service center.
2. Remove dust cap from sewage drain outlet and connect sewage drain hose. Be sure it is firmly attached.
   sewage Drain Outlet
   (Located in water service center)
   -Typical View
3. Place the outlet end of sewage drain hose into disposal opening.
4. Open the Front Black Waste Tank Drain Valve #1 (located in passenger side compartment ahead of the rear axle).
   Black Waste Tank Drain Valve #1 (Front)
   (Located in passenger side compartment ahead of rear axle)
   -Typical View
5. Open the Front Black Waste Tank Drain Valve #2 (located in water service center).
   
   Black Waste Tank Drain Valve #2 (Front) (Located in water service center)
   -Typical View
6. Press and Hold the Waste Pump switch (located in the water service center) and make sure there are no sags in the hose. Release the Waste Pump switch and close the Front Black Waste Tank Drain Valves #1 and #2 as soon as the tanks are empty.
   Waste Pump Switch (Located in water service center)
   -Typical View
7. NOTE: Sound of Waste Pump will change significantly when tank is empty.
8. Open the Rear Black Waste Tank Drain Valve (located in the water service center). Move the hose gently about to dislodge any waste and ensure complete drainage. Close Rear Black Waste Tank Drain Valve as soon as tank is empty.
   Black Waste Tank Drain Valve #2 (Front) (Located in water service center)
   -Typical View
9. Press and Hold the Waste Pump switch (located in the water service center) and make sure there are no sags in the hose. Release the Waste Pump switch and close the Front Black Waste Tank Drain Valves #1 and #2 as soon as the tanks are empty.
   Waste Pump Switch (Located in water service center)
   -Typical View
10. NOTE: Sound of Waste Pump will change significantly when tank is empty.

Using On-Site Sewer Hook-Ups

The sewage drain hose may remain attached to the sewage drain outlet while the motorhome is parked and connected to an on-site sewage hookup.

WARNING
Service inlet access must be closed when utility connections are not in use.

When using a sewer hook-up, keep the dump valves closed until a tank becomes full or when preparing to leave the site. This keeps the solids IN suspension, allowing them to be carried out with the liquids when the dump valves are opened. If the valves are left open, the liquids will drain off, leaving solids in the tank. Should this accidentally happen, disconnect the sewage drain hose, fill the tank about half full with water, and drive a few miles to dislodge the solids. A few starts and stops will aid in the process. Then reconnect the sewage drain hose and drain in the normal manner.
NOTE: Always keep sewage drain outlet capped while sewage connection is not in use.

Holding Tank Level Indicators

See “Systems Monitor Panel” in Section 4–Appliances for further information on the monitor panel and checking tank levels. See “Specifications” in Section 1–Introduction for tank capacities for your model.

WATERLINE & TANK DRAIN VALVES

The waterline and tank drain valves are used to drain water from the water tank and the water supply lines when preparing the motorhome for storage or when sanitizing the water system. See the “Water System Drain Valve Locations” chart at the end of this section for locations on your model.

Waterline Drain Valve
-Typical installation shown

Water Tanck Drain Valve
-Typical installation shown

WATER HEATER BYPASS AND ANTIFREEZE SIPHON VALVES

Your motorhome may be equipped with a Water Heater Bypass valve and an Antifreeze Siphon (Winterization) valve for winterizing waterlines using RV antifreeze. Turn the handle as shown to either bypass or flow mode. Refer to the “Water System Drain Valve Locations” chart at the end of this section for locations on your model.

CAUTION
Leave bypass valve handle in NORMAL FLOW position if draining water and blowing out waterlines. Place in BYPASS position ONLY when using antifreeze solution in waterlines.

WINTERIZING PROCEDURE

You can winterize the water and plumbing system of your motorhome using one of the following two methods – 1) Blow out waterlines using compressed air or – 2) Fill waterlines with RV water system antifreeze.

Method 1 – Blow Out Procedure

(Drain and purge waterlines using compressed air)

1. Level the Motorhome. If the motorhome is not level, there may be “low points” in waterlines that can trap water in the lines and prevent it from draining properly.
2. Drain Fresh Water Tank and Waterlines. Open all waterline drain valves and drain fresh water tank. (See “Water System Drain Valve Locations” chart at the end of this section for locations of drain valves on your model).
3. Drain Exterior Shower/Wash Station. Open exterior shower knobs and lay shower head on ground as shown to drain any water left in the shower line. Also place the tip of your finger into the city water inlet and gently press the backflow valve “button” in the center of the inlet to drain any water trapped in the inlet line.
   Using exterior shower to drain waterline -Typical View
4.  Remove Full-Coach Water Filter. Remove the filter canister from the Full-Coach Water Filtration System in the water service center and discard the filter cartridge.
   After emptying the canister, remount it onto the filter assembly and continue the Blow-Out Procedure.
5.  Open Faucets. Turn on the water pump and open all sink faucets and shower head knobs. Leave open after water stops flowing.
6. Drain Toilet. Press the toilet flush pedal and hold until water stops flowing in the toilet. Then turn Water Pump switch off.
7. Drain Optional Appliances. At this time, if your motorhome is equipped with an optional refrigerator ice maker or washer/dryer, the waterlines for that must also be drained. (See “Winterizing Optional Appliances” instructions at the end of this section.)
   If not, proceed to the next numbered step.
8. Drain Water Heater. Turn off the Water Heater power switch before draining the water heater tank to avoid damage to the heating element. Drain the water heater by removing the plug from the base of the water heater tank, accessible from the outside of the motorhome. (Requires socket and ratchet).
   Water Heater Drain Plug (Remove with socket)

CAUTION
Hot water can escape from tank causing injury. Operate relief valve or remove drain plug only when the tank water is cold.

• Also, open the Pressure-Temperature Relief valve at the top right portion of the tank to prevent air locking in the tank while draining.
  Pressure-Temperature Relief Valve (Lift handle only when water heater is cold)
• Connect Air Pressure.
  After water has stopped draining at all faucets and drain valves, leave faucets open and connect a “blow-out” plug to the city water connection on the motorhome. Then use a compressed air hose regulated to 30 psi or less to force air through the system. A blow-out plug can be purchased at any Winnebago Industries® dealer.

NOTICE
Limit air pressure to 30 psi to avoid damage to equipment.

NOTE: DO NOT burst air into the system. This can damage the water pump. It is better to let air in slowly.

1. Let air flow for five minutes until water is completely drained out of faucets and drain valves. Then close faucets one at a time.
2. Drain Toilet. Operate and hold toilet flush lever until water is completely drained from toilet.
3. Turn air pressure off. Disconnect water purge adapters. Recap the city water inlet to avoid contamination by dirt or insects.

After Disconnecting Air Pressure

• Close all waterline and tank drain valves and all faucets to avoid contamination by dirt, insects, or rodents. Reinstall the water heater drain plug and close the Pressure-Temperature Relief valve.
• Pour about one cup of RV antifreeze down each drain for the galley sink, lavatory sink, and shower/tub. This fills the drain trap pipes to prevent holding tank odors from entering the motorhome during storage.

NOTE: It is not necessary to add antifreeze to the toilet since the flush valve will be closed. Do not add automotive antifreeze or caustic chemicals such as bleach or laundry detergents into the toilet bowl or holding tanks. Although these products may have a deodorizing effect, they may damage plastic and rubber parts in the system.

• Empty the water pump strainer filter bowl to avoid water freezing and cracking the filter bowl. See “Water Pump” previously in this section.

Dump and Clean Holding Tanks

• Completely drain the sewage and waste water holding tanks at an approved waste disposal site. Drain the sewage tank first so the following waste water can rinse any waste solids from the dump outlet and sewer hose. Close dump valves and refit the dust cap onto the drain outlet. This will inhibit rust formation on valve shafts and prevent entry and contamination by airborne debris, insects, and rodents.

Your drainage and fresh water systems are now winterized.
See instructions for removal from storage in Section 11 – Maintenance and Storage.

Method 2 – Antifreeze Fill Procedure (Fill plumbing lines with RV water system antifreeze)

NOTE: As an alternative to totally draining the plumbing system, you may winterize tanks and lines by pumping non-toxic RV antifreeze through the system. This product is available from your dealer and from most RV supply stores. Follow directions on the container to determine the correct amount to use for your motorhome.

Your motorhome is equipped with a manually operated waterline winterization system for your convenience in winterizing fresh waterlines.
The system features a Winterization (diverter) valve with an antifreeze siphon tube to draw non-toxic RV water system antifreeze into the waterlines. There is also a Water Heater Bypass valve to avoid filling the water heater with antifreeze. See the “Water System Drain Valve Locations” chart at the end of this section for location on your model. Leave the Water Heater Bypass valve handle in NORMAL FLOW position if draining water and blowing out waterlines. Place in BYPASS position ONLY when using antifreeze in waterlines.

WARNING
Never use automotive antifreeze/coolant in your RV water system. Auto antifreeze contains ethylene glycol which, if ingested, can cause blindness and can be fatal.

Remove Water Filters (if equipped)

Remove Full-Coach Water Filter. Remove the filter canister from the Full-Coach Water Filtration System in the water service center and discard the filter cartridge. After emptying the canister, remount it onto the filter assembly and continue the Blow-Out Procedure.

Set Up Winterization Valves

• Turn Water Heater Bypass valve to BYPASS position. (See “Water System Drain Valve Locations” chart at the end of this section for location of bypass valve on your model).
• Remove and save the protective cap from the end of the antifreeze siphon tube (save cap to cover tube after use).
• Insert the end of the antifreeze siphon tube into a pail or other container with 2 to 3 gallons of non-toxic RV antifreeze solution.
• Turn the Winterization valve handle so that it points toward the antifreeze siphon tube. (See “Water System Drain Valve Locations” chart at the end of this section for location on your model).

Antifreeze Siphon Tube
Insert into container of RV water system antifreeze

• Winterization Valve
• Point toward antifreeze siphon tube to winterize.
  

RV Antifreeze Siphon Tube and Winterization Valve
-Typical View

NOTE: Ensure that all drain valves are CLOSED before pumping RV antifreeze into the water system. Refer to the “Water System Drain Valve Locations” chart at the end of this section for valve locations on your model.

Fill Lines

1.  Turn the Water Pump switch on.
2. Open each hot and cold water faucet handle in the motorhome – one at a time, until antifreeze solution just begins to flow from the faucet, then close.
3. Do not forget the exterior shower/wash station knobs.
4. Press the toilet flush pedal and hold until antifreeze begins flowing into the toilet. Leave small amount of antifreeze that remains in the bowl.

When Done Add RV Antifreeze

• Turn the Water Pump switch off.
• Turn the Winterization valve so it points toward the waterline to the water pump. This will stop the flow from the antifreeze siphon tube and revert the tank line flow to the water pump.
  Replace the protective cap onto the end of the antifreeze siphon tube to keep out insects and debris when not in use.

Drain Water Heater

•  Turn off the Water Heater power switch before draining the water heater tank to avoid damage to the heating element.
• Drain the water heater by removing the plug from the base of the water heater tank, accessible from the outside of the motorhome (requires socket and ratchet).
  Water Heater Drain Plug(Remove with socket)
• CAUTION
  Hot water can escape from tank causing injury. Operate relief valve or remove drain plug only when the tank water is cold.
• Also, open the Pressure-Temperature Relief valve at the top right portion of the tank to prevent air locking in the tank while draining.

Pressure-Temperature Relief Valve
(Lift handle only when water heater is cold)

• Reinstall the water heater drain plug and close the P-T Relief valve when drained.
• Drain Optional Appliances
•  At this time, if your motorhome is equipped with an optional refrigerator ice maker, the waterlines for that must also be drained.(See “Winterizing Optional Appliances” instructions at the end of this section.) If not, proceed to the next numbered step.
• Fill Drainage System P-Traps
  
• Pour about one cup of RV antifreeze down each drain for the galley sink, lavatory sink, and shower/tub. This fills the drain trap pipes to prevent holding tank odors from entering the motorhome during storage.

Dump and Clean Holding Tanks

•  Completely drain the sewage and waste water holding tanks at an approved waste disposal site. Drain the sewage tank first so the following waste water can rinse any waste solids from the dump outlet and sewage drain hose. Close dump valves and refit the dust cap onto the drain outlet. This will inhibit rust formation on valve shafts and prevent entry and contamination by airborne debris, insects, and rodents. Your drainage and fresh water systems are now winterized. See instructions for removal from storage in Section 11 – Maintenance and Storage.

To Winterize the Waste Pump (Model 35F with forward bathroom toilet)

1. Ensure that black and gray holding tanks are completely empty.
2. Pour 2 gallons of RV antifreeze down forward bathroom toilet.
3. Press and Hold the Waste Pump switch for approximately 5-10 seconds to get antifreeze into the pump.

WINTERIZING OPTIONAL APPLIANCES Winterizing Ice Maker
Norcold® Refrigerator –If Equipped

1. Drain motorhome waterlines.
2. Unscrew the water supply line from the bottom of the water inlet valve and drain any water left in the line. This connection is located in the refrigerator service access compartment on the outside of the motorhome (see “Refrigerator Service Access Compartment” in Section 4 – Appliances and Systems).

Ice Maker Water Supply Connection (Located in refrigerator service access compartment on outside of the motorhome)
-Typical View

• Let the Ice Maker run through a cycle, then raise the wire shut-off arm to the OFF position.
• Ensure water has drained from the Ice Maker supply line, then reconnect to inlet valve.
•  Ice Maker is now winterized.
• To use Ice Maker again after seasonal storage:

1. Flush antifreeze from the waterlines (if antifreeze fill winterization procedure was performed).
2. Close all drain valves.
3. Turn the water supply ON.
4. Ensure the ice bin is in place and the wire shut-off arm is lowered to the ON position.
5. Let the refrigerator cool down to ice making temperature. Remember, this can take up to 24 hours.
6. Let the Ice Maker cycle and dump the first batch of ice.

Residential Refrigerator –If Equipped

1. Shut off water supply to the Ice Maker and/or water dispenser. The water supply valve is located inside a galley cabinet near the filter.
2. Remove Ice Maker Drain Line from exterior Residential Refrigerator service compartment and allow to hang loose on outside of vehicle.
   
3. Turn Ice Maker Winterization Drain valve to the OPEN position.
   
4. Ice Maker Winterization Drain Valve (Located in exterior Residential
   Refrigerator service compartment)

• Use an air compressor with pressure output of 30 psi to blow out drain lines.
• After the last batch of ice dispenses, raise the wire shut-off arm to the OFF position.
• Empty ice bin.
• To use Ice Maker again after seasonal storage:

1. Flush antifreeze from the waterlines (if antifreeze fill winterization procedure was performed).
2. Close all drain valves.
3. Turn Ice Maker Winterization Drain valve to the CLOSED position.
4. Turn the water supply ON.
5. Ensure the ice bin is in place and the wire shut-off arm is lowered to the ON position.
6. Allow the refrigerator to cool down to ice making temperature. Remember, this can take up to 24 hours.

NOTE: Discard the first two batches of ice cubes. It will take approximately three cycles for the Ice Maker to produce fully formed, clean ice cubes.

Winterizing Washer/Dryer
(Stackable) –If Equipped Method 1 – Drain Water

If you have decided to completely drain the motorhome waterlines, follow these steps to winterize your Washer/Dryer:

1. With the Washer/Dryer power OFF, pour 1/2 quart of RV-type antifreeze into the Washer drum.
2. Close door. Advance Cycle Selector to “B”.
3. Press ON/OFF button, then press START. Let the Washer/Dryer run for 1 to 2 minutes.
4. Press ON/OFF button to turn power OFF.
5. Unplug Washer/Dryer from electrical outlet (or disconnect power).
6. Turn Water Supply Faucets OFF. Disconnect inlet hoses from faucets.
7. Drain remaining water from hoses. Finished.

To use Washer/Dryer again after seasonal storage:

1. Reconnect water inlet hoses to corresponding
2. Plug Washer/Dryer into electrical outlet (or reconnect power).
3. With Washer/Dryer power OFF, pour 1/2 TBSP. of powder detergent (or liquid equivalent) into “Compartment 2” inside Dispenser Drawer.
4. Advance Cycle Selector to “Position 4”.
5. Press ON/OFF button, then press START.
6. Allow machine to run through the complete cycle to clean out any remaining antifreeze. Finished.

Method 2 – Fill with RV Antifreeze

If you have decided to fill the motorhome waterlines with RV antifreeze, follow these steps to winterize your Washer/Dryer:

1. With machine power OFF, advance Cycle Selector to “Position 3”.
2. Press ON/OFF button, set water temperature to WARM, then press START. Let machine fill until the drum turns (this could take up to 1 to 2 minutes).
3. Press ON/OFF button to turn power OFF.
4. Advance Cycle Selector to “B”.
5. Press ON/OFF button, then press START.
6. After letting antifreeze drain completely from drum, press the ON/OFF button to turn power OFF. Finished.

To use Washer/Dryer again after seasonal storage:

1. Reconnect water inlet hoses to corresponding HOT/COLD faucets. Turn faucets ON. NOTE: Check water inlet hoses and pump periodically (see manufacturer’s user guide for further information).
2. Plug Washer/Dryer into electrical outlet (or reconnect power).
3. With Washer/Dryer power OFF, pour 1/2 TBSP. of powder detergent (or liquid equivalent) into “Compartment 2” inside Dispenser Drawer.
4. Advance Cycle Selector to “Position 4”.
5. Press ON/OFF button, then press START.
6. Allow machine to run through the complete cycle to clean out any remaining antifreeze. Finished.

Winterizing Washer/Dryer (Combination) –If Equipped Method 1 – Drain Water

If you have decided to completely drain the motorhome waterlines, follow these steps to winterize your Washer/Dryer:

1. With the Washer/Dryer power OFF, pour 1/2 quart of RV-type antifreeze into the Washer drum.
2. Close door. Advance Cycle Selector to SPIN.
3. Press ON/OFF button, then press START. Let the Washer/Dryer run for 1 to 2 minutes.
4. Press ON/OFF button to turn power OFF.
5. Unplug Washer/Dryer from electrical outlet (or disconnect power).
6. Turn Water Supply Faucets OFF. Disconnect inlet hoses from faucets.
7. Drain remaining water from the hoses. Finished.

To use Washer/Dryer again after seasonal storage:

1. Reconnect water inlet hoses to corresponding
2. Plug Washer/Dryer into electrical outlet or reconnect power supply.
3. With Washer/Dryer power OFF, pour 1/2 TBSP. of powder detergent (or liquid equivalent) into “Compartment 2” inside Dispenser Drawer.
4.  Advance Cycle Selector to “Position 9”.
5. Press ON/OFF button, then press START.
6. Allow machine to run through the complete cycle to clean out any remaining antifreeze. Finished.

Method 2 – Fill with RV Antifreeze

If you have decided to fill the motorhome waterlines with RV antifreeze, follow these steps to winterize your Washer/Dryer:

1. With machine power OFF, turn Wash Temp knob to HOT.
2. Advance Cycle Selector to “Position 3”.
3. Press ON/OFF button, then press START. Let machine fill until the drum turns (this could take up to 1 to 2 minutes).
4. Press ON/OFF button to turn power OFF.
5. Advance Cycle Selector to SPIN.
6. Press ON/OFF button, then press START.
7. After letting antifreeze drain completely from drum, press the ON/OFF button to turn power OFF. Finished.

To use Washer/Dryer again after seasonal storage:

1. Reconnect water inlet hoses to corresponding HOT/COLD faucets. Turn faucets ON.
   NOTE: Check water inlet hoses and pump periodically (see manufacturer’s user guide for further information).
2.  Plug Washer/Dryer into electrical outlet or reconnect power supply.
3. With Washer/Dryer power OFF, pour 1/2 TBSP. of powder detergent (or liquid equivalent) into “Compartment 2” inside Dispenser Drawer.
4. Advance Cycle Selector to “Position 9”.
5. Press ON/OFF button, then press START.
6. Allow machine to run through the complete cycle to clean out any remaining antifreeze. Finished.

WATER SYSTEM DRAIN VALVE LOCATIONS

WATER SYSTEM DRAIN VALVE LOCATIONS
Model	System	Drain Valve Locations
Model 35F	Waterlines	Valve located in rear driver side compartment behind rear axle. Open exterior shower faucet and lay shower head on ground. Also, place the tip of your finger inside the city water connection and gently press the backflow valve (small “button” in center of connector) to drain any water left in the city waterline.
	Water Tank	Black handle valve in driver’s side compartment behind rear axle.
	Water Heater	Drain plug on outside of motorhome behind service door. Use socket to remove drain plug.
	Water Heater Bypass Valve	Valve behind water heater. Remove drawer below oven to access.
	Winterization (Antifreeze) Valve	Valve and siphon tube are located in the utility compartment (driver side).
Model 36Z	Waterlines	Inside utility compartment (rear driver side compartment). Open exterior shower faucet and lay shower head on ground Also, place the tip of your finger inside the city water connection and gently press the backflow valve (small “button” in center of connector) to drain any water left in the city waterline.
	Water Tank	Black-handled valve in driver’s side compartment behind rear wheel.
	Water Heater	Drain plug on outside of motorhome behind service door. Use socket to remove drain plug.
	Water Heater Bypass Valve	Valve located inside utility compartment (rear driver side compartment).
	Winterization (Antifreeze) Valve	Valve located inside driver’s side compartment behind rear wheel.

Model 34W	Waterlines	Valve located in rear driver side compartment behind rear axle. Open exterior shower faucet and lay shower head on ground. Also, place the tip of your finger inside the city water connection and gently press the backflow valve (small “button” in center of connector) to drain any water left in the city waterline.
	Water Tank	Black handle valve in driver’s side compartment behind rear axle.
	Water Heater	Drain plug on outside of motorhome behind service door. Use socket to remove drain plug.
	Water Heater Bypass Valve	Valve behind water heater. Remove drawer below oven to access.
	Winterization (Antifreeze) Valve	Valve and siphon tube are located in the utility compartment (driver side).

Reference Links

View Full User Guide: Winnebago Adventurer 2023 User Manual

Download link: https://www.winnebago.com/owners/owner-resources/manuals-and-diagrams/operator-manuals