FOUR WINDS INTERNATIONAL
WATER SYSTEMS
82
Class C Water System Winterization
1. Level the unit for good system drainage.
2. Drain the waste water tanks (black then grey following drainage guidelines).
3. Turn the water pump switch off.
4. Open all faucets, and water heater drain.
5. Open low point drains on the water lines (pull up and twist valve) and the outside shower to let
water drain.
6.
Drain the fresh water tank using outside spigot type drains.
7. When all lines are drained, close water tank valve, all faucets, water heater drain, and low
point drains on water lines.
8. Turn water heater bypass valve on to prevent tank from filling with antifreeze.
9. Remove water filter (if installed) and replace with bypass cap to protect filter.
10. Remove water pump line at fresh water tank location and attach siphon hose to fitting.
11. Turn on water pump and let each faucet run until antifreeze flows freely from both hot and cold
lines. Also run the shower and toilet until antifreeze is visible.
12.
Turn off water pump.
13.
Pour one cup of antifreeze in every drain to protect the P-traps.
Before using the system again in warmer weather, completely flush the system with water, flush the toilet, and
sanitize the entire fresh water system. When using the motor home during cold weather and water in a tank or
drain line should happen to freeze, you should take immediate steps to thaw it before damage to the system
occurs. DO NOT continue to use water system components if such a condition exists. If damage has occurred,
make sure to have it repaired before using again.
WATER SYSTEM MAINTENANCE
As with any mechanical system, your plumbing is subject to the development of problems. Most of these
problems can be greatly reduced if not altogether eliminated by following a schedule of planned inspections and
maintenance. Neglect of proper maintenance procedures is the usual cause of most water system problems.
Road vibrations and shocks, as well as excessive pressure from some city water sources are the main physical
causes of water system damage. It is important to inspect all plumbing joints and fittings often for cracks and
leaks. Water leaking from a plumbing joint can cause considerable damage if left unchecked.
A leak somewhere in the fresh water system should be suspected whenever the pump is running
and all faucets and valves are closed. When the leaking fitting has been identified, attempt to
stop the leak by tightening. DO NOT over tighten. Plastic fittings rarely need to be tightened with
a wrench. If these fittings leak after tightening by hand, disconnect the fitting and check for dirt,
scale, or other foreign substances which may be causing the leak. Clean the fitting thoroughly and
reinstall. If leaking persists, shut off the water supply until the fitting can be properly replaced. Check with your
dealer for correct method of replacement, and replacement parts.
Proper winterization procedures of plumbing systems will normally be all that is necessary to prevent the
damage caused by freezing. Freezing damage can harm any component of the system, including the water
tanks, toilet, pump, and all piping. Be sure to follow the winterization procedures outlined in this manual. Also
be sure to discuss any additional precautions that should be taken to winterize your motor home’s plumbing
system with your dealer. Local climates vary; and winter maintenance needs may be effected.
Be sure to read the literature supplied with plumbing components, such as the pump, for troubleshooting tips.
Also remember that it is possible for an electrical problem to cause water system problems. Lack of power to
the pump can be caused by a variety of reasons. If you are unsure of how to locate and or repair a plumbing
problem, it is best to have your dealer or a qualified plumber handle the job.
