Frequently Asked Questions


Does it smell bad?

No. Because you never mix the liquid wastes with the solid wastes it does not have the odours associated with sewage or holding tank systems. When working properly it will have a slight earthy smell.

When should I empty it?

It is best to allow the solids to decompose before emptying your toilet. The longer you wait before emptying your toilet, the nicer the job will be. Many boaters will leave the solid wastes in the toilet over the winter and empty it in the spring. That may not be possible for some applications, but you will find that even in as little as one week much of the solid wastes have begun to decompose, and just the paper products are visible. It is best if you do not leave the liquid wastes in the tank for extended periods. While everyone is different, some urine will smell bad if allowed to sit for extended periods.

Where do I empty it?

The proper place to empty the solids tank is in a composting bin where it can be used to fertilize ornamental plants. Boaters may empty theirs overboard if they are the proper distance offshore. Some campgrounds may have composting bins as composting toilets become more popular. The liquid tank can be emptied into a toilet or overboard if well offshore.

How does it separate the liquids and the solids?

The toilet has a gate or door that when closed directs the liquid waste into the front tank. When the door is open the solids pass through to the lower main tank. When seated on the toilet (male or female) the liquids naturally are aimed towards the front collection area and the solids are directed straight down into the main tank.

Can I use it standing up?

Yes, although the recommended use is sitting down, especially when underway in a moving vehicle or vessel. This minimises ‘splatter’ and will be appreciated by the person who has to maintain the unit. A small sign saying ‘Men, all performances must be conducted sitting down please!’ will do the trick.

Why is the toilet seat moulded into the unit?

Because we designed this toilet for the “mobile” market, this became a safety issue. I have spoken with boaters who have had a toilet seat break off in rough conditions. I have heard of other boaters lifting the seat and sitting on the base of the toilet to avoid this problem. (That can’t be comfortable). While this isn’t as likely with an RV, it would not be out of the question.

Do I need to run the fan all the time?

While the unit can be operated without the fan it performs best if it runs all of the time. This will prevent any musty odours escaping from the unit and helps with the aerobic composting process. If battery drain is a concern then you might consider attaching the unit to a solar vent instead of using the built in fan, or using a small solar panel to offset the battery drain.

What are the dimensions of the unit?

The dimensions are: 546mm tall, 486mm front to rear, and 330mm wide at the base. The toilet is 495mm wide at the seat. See the .pdf file or the installation section of this website for full information.

Will freezing temperatures damage the toilet?

Other than emptying the urine bottle nothing needs to be done and it will not affect the toilet.

Does composting work in cold conditions?

Composting works from 12 degrees centigrade and warmer. The warmer it is, the faster it compost. When there is freezing temps the compost will be dormant until heat is introduced into the area.

Can the toilet be used in a basement?

Yes it will work fine in a basement and any room or closet where a toilet is required.

The agitator handle turns with difficulty. What do I do?

If the compost gets dry, the handle may not turn easily. Adding used coffee grounds results in added moisture and keeps the compost loose so that it mixes better.

What kind of toilet paper must be used?

Any kind of toilet paper will work, however single ply paper breaks down quicker. Many single ply papers are approved for septic tanks.

How do we remove build up in the liquids bottle?

Rinse the bottle, add vinegar and some pea gravel. Shake well and the build up will break loose.

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