Cargo trailer bathroom plan
Here's my plan (so far): I have a 12 foot cargo trailer to haul two motorcycles. The bikes take the back 8'. I pull it behind my Transit van. The van is done other than a NO BATHROOM. I'm building a bathroom in front of trailer. I'm doing water tanks now. I bought two 20 gallon tanks. One for grey and on for fresh on top of each other. Those 2 are mounted on the wall opposite the door (North to South). Custom shower is in the "V". Small sink next to shower in "V" passenger side. Shower and sink drain into a plastic box (for a boat shower) under the floor with a float switch and a 12 volt pump in it. It pumps the shower and sink into the grey tank with a check valve in the hose. I tested it and it works great BUT......... I'm changing plan a little. I was going to use a toilet with those bags. Almost just a bucket with a snap on seat. I don't want to deal with that. I want a RV toilet and black tank.
New plan: I looked a black tanks and was thinking small (8 gallons) but I don't want to have to dump every other day,,, so..... Buy 27 gallon tank. Then raise my "stacked" grey and fresh maybe 5 inches off the floor. Cut the floor out 17 x 36 (East to West) to allow a black tank to be mounted "partly" under the trailer and protrude up into the bathroom about 3 1/2 inches above the floor. The black tank is 36x17x10. Eighteen & 1/2 inches (with of the length (36) will be under the other tanks in an "L" shape. The other end of the black tank (shallow side) sticks up above the floor toward the door. I'll build around it with 2x4's on edge. Cover those with plywood and mount a low profile toilet on top. That gets the black tank up off the road and the drain comes out just below the bottom edge of the trailer in front of the axle.
The low profile toilet gains me 4 1/2 inches for the toilet platform and I still maintain correct seat height.
MOTE: On my old motorhome, I'd use grey water to flush the back tank. It had three valves plumbed in a "T".
I'm thinking about plumbing this so that the grey water could drain into the black tank vent (using a gate valve) to flush it after the black was emptied. The grey is my highest tank so gravity would do the work. I'd also have the option of just draining the grey separately through a garden hose.
Question #1: Anything wrong with that plan? The floor plan works for us.
Question #2: Wife asked why not flush the toilet with grey water and not waste fresh just to flush. Does anyone do that? Seems like the grey would stink.
ANY AND ALL ADVICE ACCEPTED ;)
New plan: I looked a black tanks and was thinking small (8 gallons) but I don't want to have to dump every other day,,, so..... Buy 27 gallon tank. Then raise my "stacked" grey and fresh maybe 5 inches off the floor. Cut the floor out 17 x 36 (East to West) to allow a black tank to be mounted "partly" under the trailer and protrude up into the bathroom about 3 1/2 inches above the floor. The black tank is 36x17x10. Eighteen & 1/2 inches (with of the length (36) will be under the other tanks in an "L" shape. The other end of the black tank (shallow side) sticks up above the floor toward the door. I'll build around it with 2x4's on edge. Cover those with plywood and mount a low profile toilet on top. That gets the black tank up off the road and the drain comes out just below the bottom edge of the trailer in front of the axle.
The low profile toilet gains me 4 1/2 inches for the toilet platform and I still maintain correct seat height.
MOTE: On my old motorhome, I'd use grey water to flush the back tank. It had three valves plumbed in a "T".
I'm thinking about plumbing this so that the grey water could drain into the black tank vent (using a gate valve) to flush it after the black was emptied. The grey is my highest tank so gravity would do the work. I'd also have the option of just draining the grey separately through a garden hose.
Question #1: Anything wrong with that plan? The floor plan works for us.
Question #2: Wife asked why not flush the toilet with grey water and not waste fresh just to flush. Does anyone do that? Seems like the grey would stink.
ANY AND ALL ADVICE ACCEPTED ;)
