Avion Black & Grey Tank

Desertboy wrote:
Ill get under there and take a better picture. And yes there is only the one small tank and another tank that's not permanently attached that came with camper. I can see the need for a pee trap definitely so I would need a little larger hole in the metal bed. The only way I could do this with a normal tank setup is to build a basement on bottom and make it flat all the way across, because of the way I will have to load it. This bed is wide and 24 feet long. I cant just back under it and then lower camper. Ive been pondering on this since Last November, and I need bigger tanks anyway, I need a flat Bottom so I can use peeler poles to roll it to the front off the truck once loaded. So far this seems like the easiest solution without doing some extensive modifications. The Cage is already mounted there on the truck. Ill try and get some good close up pics of the bottom of the camper. Maybe you guys will see something Im missing. Thank you for all the inputs, I need all the advise I can get.

After thinking about what you are trying to do, I would just remove all the tanks, and piping from under the camper. I would cut a hole fairly small, but large enough to put a rubber coupling on a 3" piece of ABS piping from the closet flange that the toilet hooks up to. Keep in mind, there is no black water tank in your way now. I would pipe the sink 1-1/2" pipe to a vertical location close to where the 3' pipe drops down through the truck bed. You can use a 1-1/2" rubber coupling on that line also. The shower drop will be 2" ABS pipe that will drop down through your truck bed and attach with a 2" rubber coupling. Your shower will be the only trap that will be below the truck bed but it can be very close to the underside of the bed. You could make all your tie ins with rubber couplings, but the shower one would be the hardest one to get to because you would have to do it from underneath the truck. The two others could be attached from inside the camper as long as you have access to it. I wouldn't have any pipes sticking below the camper in case you decide to "roll" the camper onto the truck with steel pipes.

You could also reinforce your shower pan, raise it about 3" and run the shower line horizontal to let it drop down near the 3" toilet line. Just a thought. I think I would just make it's connection from underneath the truck.