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Section 8: Plumbing System
NOTE: The water heater must be drained to prevent damage
from freezing. It is recommended the water heater be drained and
bypassed during the winterization process particularly if introducing
RV antifreeze into the plumbing system. Do not drain the water
heater while it is hot or under pressure! Antifreeze should be
kept out of the water heater.
The preferred method to winterize your recreation vehicle is by using RV antifreeze in the
plumbing system.
Air Pressure Method
This method uses compressed air to blow out any remaining water in the system after ini-
tially draining water using drain valves. Tools required would be an air compressor and a
blowout plug.
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 questions, consult with your RV dealer. Using RV antifreeze is
the preferred method of winterization.
Recommended pressure is 30 PSI, exceeding this pressure may rup-
ture water line couplings and void your warranty.
Turn off the water heater gas valve typically
1.
located outside the RV. Water heater power
should be OFF (turn off both ELECTRIC and
GAS switches).
2.
Level the RV and drain the fresh water plumbing
system. See Draining the Fresh Water System.
3.
Water heater bypass should be set to NORMAL.
This allows air to flow through the water heater.
If the drain plug is still in place, it should be
removed (as shown). Refer to the Water Heater
Bypass section.
RV water filter should be removed for winterizing.
4.
Refer to Water Purification System section. Your RV may have a cartridge type water
filter. Remove the cartridge filter (if so equipped), and replace it with a bypass hose
supplied with your RV. Antifreeze should be kept out of the water filter.
NOTE: Filters should be replaced at the beginning of the camping
season or if they have come into contact with contaminated water or
antifreeze.
122
Water Heater Drain Plug Location
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