How you decide to store your motorhome and protect the water lines is
up to you. You may elect to have the water lines blown out with air to
remove standing water or fill the lines using an approved FDA RV antifreeze.
When using either method, all the interior and exterior faucets will need to
be opened and closed, one at a time, to verify that all water has been purged.
All low point drains should be opened, and holding tanks emptied.
To use air pressure to winterize your motorhome you will need access
to an air compressor and adapter to connect the air line to your water sys-
tem. Adapters can be found at any RV supply store. System pressure
should not exceed 50 psi. when hooked to the water lines. Higher pressure
will damage the lines.
1. Remove the water filter elements from the filters and reassem-
ble the filters without the elements (see “Water Filter”).
2. Drain the fresh water tank by opening the valve located in the
outside water control service compartment of the motorhome.
3. Open the water heater and the low-point drains. Turn knobs to
open the drains. Opening the low point drains clears the water
out of the hot and cold water lines. Leave the low-point valves
open until you are ready to use the motorhome again.
4. Let all the water drain. Turn the pump on and allow it to run
so that all the water is cleared out of the pump and lines. Turn
the pump off.
5. After the water lines are drained, hook an air hose to the city
water connection located on the water control panel in the out-
side service compartment. Blow out the water lines until no
further water can be seen coming out of the drain lines. Do not
exceed 50 psi in the water lines and faucets.
6. Open all faucets (including the outside spigot), one at a time
while the air is on, to clear water from the faucet supply lines.
Do not forget to drain your shower.
7. While the air is on, hold the spray nozzle (located right next
to the toilet) open until the water has quit running. Hold the
toilet flush pedal/handle down until the water has stopped run-
ning.
8. Unhook the air hose and close the city water connection.
9. You will need 1 gallon of RV antifreeze to protect various
water drain lines in your motorhome. Pour 1 pint into both the
kitchen and bath shower drains. Pour 2 pints into the bath sink
drain, with some of the antifreeze going into grey tank to pro-
tect the drain valve. While holding down the flush button,
pour another 3-1/2 pints into the toilet, letting the antifreeze
Water Systems
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WINDSOR 6•173
WINTERIZING
Fresh Water System
Using Air Pressure
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