Dometic SeaLand 8812 - Manual (Page 14)

4
winTERiZing
At the end of each season, the SeaLand macerator toilet should be winterized for storage by using
potable water-safe antifreeze (if boat or vehicle will be exposed to freezing temperatures).
nOTE: Use nontoxic antifreeze designated for potable water systems. (See boat or vehicle
owner’s manual.)
CAuTiOn: never use automotive-type antifreeze in freshwater systems.
PRESSuRiZED FRESh wATER SySTEM
1. Drain potable water tank and empty holding tank.
2. Add freshwater antifreeze to potable water tank.
3. Flush potable water antifreeze and water mixture through toilet(s) and into entire system,
including the waste holding tank, diverter valve connections, discharge pumps, etc. Turn off
power to toilet.
Each installation is different, so amounts may vary. User discretion is required to assure
adequate protection.
RAw wATER SySTEM
Parts required:
• 1-1/2-inch (38mm) ID hose, about 3-feet (1m) long
• 5/8-inch (16mm) ID hose, about 3-feet (1m) long
• two containers
1. Close intake and discharge seacocks. See Hazard of Flooding risks on page 3.
2. Turn off power to toilet.
3. Disconnect and drain intake hose, discharge hose, and in-line filters.
4. Connect 5/8-inch (16mm) ID hose to raw water pump intake and 1-1/2-inch (38mm) ID hose to
toilet discharge.
5. Place one container under hose connected to toilet’s discharge.
6. Place hose connected to intake pump into bucket with antifreeze and pour antifreeze in other
container.
7. Turn on power to toilet and flush until antifreeze is removed from toilet.
8. Disconnect power to toilet and reconnect all intake and drain hoses.
ExTEnDED PERiODS OF nOn-uSE – LAying uP TOiLET
The macerator pump and sanitation hoses should be treated if toilet will not be needed for an
extended period of time (more than two weeks and especially in hotter weather).
1. Flush toilet in “Normal” mode and add 4 oz. (120 ml) of liquid biodegradable laundry detergent
(should NOT contain bleach or environmentally harmful substances). Note: If using sea water
for flushing, shut off power to sea water pump and add fresh water by pouring directly into the
bowl during the flush cycle.
2. Flush toilet at least five times.
3. Turn off water supply to toilet.
4. Flush the toilet without water. Repeat three times. (This procedure will minimize any remaining
water in the macerator pump.)
5. Turn off power to the toilet (and water supply pump if flushing with sea water).
6. Close all seacocks.
If system will be subjected to freezing temperatures, please follow above procedure, and then
winterize system as described below.