Forum Discussion

Talisman61's avatar
Talisman61
Explorer
Jan 31, 2018

TC Black tank Mounting

I'm currently redoing the entire bathroom in my TC. I have a combo shower pan, and room, to put a black tank directly below my toilet.

I'm looking at this TANK.

I will be adding a new short toilet.

My question is, can the toilet flange be installed and mounted directly to the holding tank? I dont have much room, so I"m attempting to squeeze the biggest tank I can in there.

Doing this also limits my venting options. but I think I have adequate room to vent out the side, if that's acceptable.
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  • Talisman61's avatar
    Talisman61
    Explorer
    Feb 19, 2018
    Revisiting this, as plans have changed, again.

    Now, we have removed the false floor from the bathroom, as I'm 6'3" and have to slouch to stand in the bathroom, and the tank will be mounted to a 7" riser system I am building to raise the camper so it fits on my gooseneck trailer better as a redneck toy hauler type design when we need it, and it'll still work on my flatbed truck with the riser.

    Mounting the toilet directly to the camper floor, with a nice big 18ish gallon tank below it attached to the riser.

    Thanks all for the help, but now I have a slew of new questions to post in a new thread :D
  • ticki2's avatar
    ticki2
    Explorer
    Feb 01, 2018
    Talisman61 wrote:
    I'm currently redoing the entire bathroom in my TC. I have a combo shower pan, and room, to put a black tank directly below my toilet.

    I'm looking at this TANK.

    I will be adding a new short toilet.

    My question is, can the toilet flange be installed and mounted directly to the holding tank? I dont have much room, so I"m attempting to squeeze the biggest tank I can in there.
    The toilet flange cannot be mounted directly to the tank , the tank will not support the toilet . It should have a plywood platform over the tank to screw the flange to . The tank should have a 3" threaded fitting in toilet location to thread the flange into . If the tank is ABS you can glue fittings to it . For venting you can also tie into any other existing vent you can get to .
    Doing this also limits my venting options. but I think I have adequate room to vent out the side, if that's acceptable.
  • Talisman61's avatar
    Talisman61
    Explorer
    Jan 31, 2018
    Kayteg1 wrote:
    I think the site is a bit misleading.
    To my understanding this picture shows the tank upside down, where the fitting up front is dump pipe.
    You suppose to have toilet flange and vent pipe on the bottom side and I don't see it.
    Do they offer compression fitting that you can put per your design?
    BTW I had RV with 5 gallons black and that was just fine.


    Yes that picture shows the bottom of the tank, with the drain up front. Based on the material i should be able to add compression style fittings for the vent and inlet.

    Waiting to hear back from the manufacturer
  • Kayteg1's avatar
    Kayteg1
    Explorer II
    Jan 31, 2018
    I think the site is a bit misleading.
    To my understanding this picture shows the tank upside down, where the fitting up front is dump pipe.
    You suppose to have toilet flange and vent pipe on the bottom side and I don't see it.
    Do they offer compression fitting that you can put per your design?
    BTW I had RV with 5 gallons black and that was just fine.

  • Talisman61's avatar
    Talisman61
    Explorer
    Jan 31, 2018
    I have an 8" cavity, below the floor, and the combo pan adds another 3 inches, so running supports across the top won't be a problem if needed, guess I'll just do that, flange attached to those and pan, small piece of tube to tank.

    Just hope 12 gallon will be enough.
  • HMS_Beagle's avatar
    HMS_Beagle
    Explorer
    Jan 31, 2018
    Usually the toilet flange physically supports the toilet, so you'd want to make sure the tank can do that.
  • Talisman61's avatar
    Talisman61
    Explorer
    Jan 31, 2018
    Lol. Noted. Vents required to expel gasses out, so makes sense. What about toilet mounting? Should be good straight to the holding tank?
  • SidecarFlip's avatar
    SidecarFlip
    Explorer III
    Jan 31, 2018
    You need to vent vertically (through the roof) not out the side. Reason is, it stinks.

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