Damon Astoria Pacific Edition Owner's Manual page 76

Chapter 11 - Winter Use and Storage
Water Heater Drain Plug

• Drain the fresh water tank by opening the low point drain valve. Let the water drain
out until the tank is empty.
• Drain both the black (waste) water tank and the gray (sink) water tanks and flush out
completely. (See complete instructions located in Chapter 6 - "Plumbing Systems").
Drain the black tank first and allow the gray water tank to rinse out the flexible hose
drain line. You may now add a commercial holding tank chemical cleaner. Driving
the unit around for a few miles will allow the cleanser to circulate within the tanks
and drains. Drain and flush once more with fresh water.
• After all the tanks have been drained, make sure that any water remaining in the
lines is either blown out, or replaced with a nontoxic RV antifreeze solution which will
prevent any water that remains from freezing. To blow out the water lines, proceed
as follows:
• Open all faucets including the toilet flushing device and the shower head
sprayer. Open any other water lines that are closed. You will need access
to an air compressor along with an adapter that will connect the air to your
unit. These adapters can be purchased at an RV supply store. Do not
exceed 55 psi when hooked up to the water lines to avoid damage. If your
vehicle is equipped with a water filter, remove and drain it before proceeding.
Replace it with a diverter tube, which will come with the unit. This will create
a bypass in the water line so that the antifreeze will not go into the filter
assembly.
• Turn on the water pump and allow it to run to clear all water from lines. Turn
off the water pump.
• Open all low point and water tank drains.
• Open the water heater cover and remove the water heater drain plug located
on the lower front side of the water heater (see photo).
• Hook an air hose to the city water connection located in the termination
compartment. Blow out the water lines (do not exceed 55 P.S.I.) until no
more water can be seen coming out of the lines. Pause for several seconds
and repeat until clear.
• Put nontoxic RV antifreeze in the drains, p-traps, and water tanks.
• If you do not have access to an air compressor, you may use the "wet" method of
winterization:
• After you have completely drained all the tanks, water heater and lines by
opening the low point drains and switching the water heater bypass valves to
the bypass position (if equipped-see page 77), close the low point, water
tank and the water heater drains.
• Pour 4-6 gallons of RV antifreeze into the fresh water tank and let
the water pump circulate the mixture. Do not dilute.