SECTION 8 - PLUMBING SYSTEM CLASS C MOTOR HOME
GH/M 8 - 12
WINTERIZATION
Preparing your motor home for colder weather or storage is very important for
most states and Canada. Failure to prepare your motor home may cause water
supply lines and the water heater to freeze.
No commodity or product should be added to the fresh water system to ensure
freeze protection other than RV antifreeze.
The motor home should be winterized at the end of the camping season or when
the motor home will be exposed to temperatures that will fall at or below 32°F
(0°C). Repairs due to freezing are not covered by warranty.
There are two methods of winterizing your motor home based upon your model.
Please read, understand and follow all instructions before beginning.
Air pressure
This method will utilize an air hose to blow excess water from the water lines.
1. Make sure all holding tanks are empty and drain valves OPEN.
2. Run the water pump until it is dry, this will take approximately 15-20 seconds.
3. OPEN all faucets and drains, and the toilet.
4. Using an air hose and adapter (customer supplied), blow air through the city
water connection. Any remaining water will blow out in five to ten minutes.
Pour one cup of non-toxic RV antifreeze into all drain P-traps.
Antifreeze method
It may be easier to winterize the motor home with another person to assist you.
1. Level the motor home and drain the fresh water plumbing system.
2. Replace the water filter cartridge with the clear plastic bypass hose.
3. Make sure the water heater 12-volt and 120-volt interior control switches are
OFF.
4. Move the valves to the “Sanitize/Winterize Lines” position. The low point
drains must be closed for the antifreeze to siphon through the lines.
5. Insert the garden hose into a container of motor home antifreeze solution (this
quantity should be enough to winterize the motor home); attach the other end
to the city water connection.
To assist the siphoning process, put the container on a surface approximately
two feet above ground level.
WARNING
Automotive antifreeze (ethylene glycol) and windshield washer antifreeze
(methanol) are poisonous. Never use these products in your fresh water
system. These products are harmful and may be fatal if swallowed
WARNING
Never apply air pressure to the water system with any of the valves in the
closed position. Air pressure applied to a closed valve, faucet or low point
drain could potentially damage the seals and cause water leaks. If you have
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