Dometic 320 User Manual

8

Dometic Gravity-Flush Toilet

Cleaning / Winterization and storage

For routine cleaning, use SeaLand

®

 Toilet Bowl Cleaner. If you cannot find it in your area, contact 

Dometic for your nearest dealer. If the cleaner is not available, use most any non-abrasive bathroom 
and toilet bowl cleaner. Please follow label instructions.

After a period of time, mineral deposits from hard water may 
build up on the flush ball or seal, resulting in a slow water 
leak. To prevent this, periodically clean the flush ball and seal.
1.  Remove minor debris from the flush ball and seal by 

slowly pressing and releasing the flush pedal several 
times. This will loosen and rinse debris from the surfaces. 
Repeat several times for stubborn buildup.

2.  If step 1 does not fully clean the ball and seal, clean with 

a soft bristle brush and SeaLand toilet bowl cleaner.  Fully 
clean the top of the flush ball and under the seal where it 
contacts the flush ball.  After cleaning underside of seal, apply light downward pressure to top of 
seal while brushing around full perimeter of seal. 

3.  If this does not correct a leaking seal, it may require replacement. 

When a Dometic toilet is stored for long periods of time or may be exposed to temperatures below 
freezing, the toilet must be winterized or stored according to one of the following procedures.

Caution
This toilet is not intended for use when exposed to temperatures below freezing.

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.)

Non-toxic Antifreeze Winterization (recommended method)
1.  Pour antifreeze in potable water tank according to instructions from antifreeze 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.