Forum Discussion

toddb's avatar
toddb
Explorer
Jun 22, 2020

Support trailer water tanks

I'm wanting to add water tanks to my trailer. I found tanks by class A customs that will fit between the cross members without giving up to much ground clearance. I'd like to add 2 20gal fresh and a 15gal grey tank.
I'm looking for solutions on how to vent the tanks, the trailer frame is 6" box and the deck on top of that. The frame rails are ~16" inboard so I can't really go vertical that far inside the floor. I thought about drilling through the frame and welding a pipe in to pass water lines through. Anyone have any other thoughts? I found marine deck fill ports that I could drive over so that may be a good option for that problem.

Todd
Truck Campers
  • BurbMan's avatar
    BurbMan
    Explorer II
    Jun 22, 2020
    Most fresh water tanks exit the vent right next to the fill location under the same hatch. If you are towing a support trailer I would add at least 100 gals of fresh water. Keep the tank up front ahead of the axles as far as possible and centered in the trailer if you can.

    I might do something like this against the inside front wall of the trailer standing on end (like in the pic) so you only lose 11" of floor space.
  • Kayteg1's avatar
    Kayteg1
    Explorer II
    Jun 22, 2020
    Holding tank vent can be 1/4" flex tubing (but 1/2" would be better), who you'd have to find a way to route up. Preferably above the roof, but 4' above still would work.
  • Lwiddis's avatar
    Lwiddis
    Explorer II
    Jun 22, 2020
    Your trailer is what it is but if you can make the waste tank(s) equal to the fresh water aboard, life will be easier.

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