Regal 42SC Owner's Manual page 339

WASTE/TOILET SYSTEM:
1. Pump out waste holding tank, fl ush the tank with fresh
water and pump out again.
2. With non-toxic propylene glycol antifreeze in the fresh
water tank, operate head until antifreeze fl ows into bowl
of each head. Allow time between fl ushes for the vacuum
to build up.
3. Operate macerator until antifreeze has a steady
fl ow coming from the discharge fi tting. Pour non-toxic
propylene glycol antifreeze solution in head and fl ush
head as needed to produce enough fl ow to winterize the
macerator.
4. Leave at least 2 gallons of non-toxic propylene glycol
antifreeze solution in the holding tank during storage.
NOTICE
USE A SPECIAL NON-TOXIC ANTIFREEZE
IN THE FRESH WATER & WASTE SYSTEM
WHICH IS AVAILABLE AT RV AND
MARINE DEALERS.
DO NOT USE AN AUTOMOTIVE
TYPE ANTIFREEZE.
IT CAN BE HIGHLY
POISONOUS AND CORROSIVE.
Storage & Winterization
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