In about a week or so, we will be installing a black water holding tank and a Thetford "Aqua Magic" toilet in a DIY LQ. The two of us have never made this installation. We have done household toilet installations, and have all the tools we should need, but we are missing the basic knowledge part.

The trailer floor has a solid exterior aluminum skin, one inch foam insulation, a half inch sub flooring and will be finished with urethane tiles installed. There will have to be two holes cut, one for the toilet and one for a stack vent.

I was reading a previous thread about a gray water tank installation, but it didn't include the mechanics of a toilet connection. My questions would include, is there a flooring flange, sealing ring and such, as with a household variant? How is the top of the tank sealed to this? Should this tank be installed, then cut from above at the same time when the flooring holes are made? Are the installation parts usually assembled into a kit, or do they have to be purchased piece meal?

This novice would greatly appreciate some hand holding and tips to properly effect this installation. I would prefer to know what to do and what to avoid before we start. I went to two RV dealers, and they were very hush hush. They offered to do the job for a handsome fee at their leisure, but would offer no self help tips, even when I said I would purchase their products at a substantial mark up. I guess it involves an industrial secret or such.

Gard

Gard,

I am not sure if they can help you, but try contacting www.jbjconversions.com . They do some great LQ conversions and are very nice folks.  He even has an online catalog for the RV parts on his website.  We took a trailer to him once to see if he could add a bunk and he was very honest with us about how it would affect the resale value of our trailer.  He does everything from weekend packages to full LQ.  I don't know if he could help you with the information you need, but he might be able to point you in the right direction.

 The holding tank manufacturers provide a 3" threaded adapter that is glued in place wherever it is needed. I believe it has internal threads. The toilet sits on a flange that is screwed to the floor.

Question: Does this toilet, floor mounted flange, screw directly into the 3" adapter as supplied by the tank manufacturer? Then is a seal put into place and in turn, the toilet is affixed to the flange?

My lack of understanding is the physical connection from the flange to the adapter. Duster's info suggests that one part simply screws into the other. Am I making more of a problem, than one exists?

Thanks all again.   Gard