System Coolant
• The system coolant does not require winterization.
• The system coolant can be tested for its freeze
protection value.
Domestic Water System
• The domestic water circuit needs to be drained or protected
using RV winterizing uid.
• Draining is accomplished by opening the low point drains and
blowing air through the water system. Please refer to the RV’s
owners manual for the procedure.
• Propylene-glycol can be pumped through the system using the
domestic water pump and opening both hot and cold valves
at a plumbing xture. Using this procedure does not require
draining the Demand Hot Water exchanger.
Winterization
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