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The preferred method to winterize your recreation vehicle is by using RV antifreeze in the
plumbing system.
Use in your fresh water system for freeze protection. No other
product or commodity should be used.
1. Turn water heater power OFF (electric and LP gas switches). Turn water heater gas
valve OFF (located outside the RV).
2. Bypass the water heater; supply valve OFF, bypass valve ON (refer to Water Heater
Bypass).
3. Level the RV and drain the fresh water plumbing system (see Draining the Fresh Water
System).
If the RV is going to be stored in a non-temperature
controlled environment with a risk of temperatures reaching 32°F
(0°C) or lower, RV antifreeze be used in the RV plumbing
system (which would also include appliances like the clothes washer,
dishwasher and refrigerator).
Automotive antifreeze (ethylene glycol) and windshield washer antifreeze
(methanol) are poisonous. Never use these products in your fresh water sys-
tem. These products are harmful and may be fatal if swallowed.
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.
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.
Antifreeze should be
kept out of the water heater.
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