Dometic 300 Serie Manual De Instrucciones página 12

Caution
Never use automotive-type antifreeze (ethylene glycol) in freshwater
systems.
Note
Use nontoxic antifreeze (propylene glycol) designated for potable
water systems. (See vehicle owner's manual.)
Storage options
Non-toxic Antifreeze Winterization (recommended method)
1. Pour antifreeze in potable water tank according to instructions from anti-
freeze manufacturer.
2. Flush toilet several times until antifreeze has flowed completely through
toilet. For toilets with hand sprayer, the hand sprayer must be turned on to
assure antifreeze is cycled through the sprayer.
Drain Water from Toilet
1. Turn off water supply to toilet.
2. Remove water supply line from water valve.
3. Place a small container under water valve inlet to catch draining water.
4. Press flush pedal and allow water to completely drain from water valve and
vacuum breaker.
5. Leave water line disconnected until threat of freezing temperature is past.
Note
Never leave vehicle or premises unoccupied for extended periods of
time with municipal water supply or onboard water pump turned on
when there is a possibility of freezing temperature.