Forum Discussion

mobilefleet's avatar
mobilefleet
Explorer
Dec 04, 2013

installing black tank and have 2 questions

got a used class c with no black tank. However a toilet has been installed and is stubbed underneath the rv already. But it's about a 45 degree black pipe coming out from toilet to the side of it. I've heard you should have a black tank directly below the toilet opening but there isn't really enough room to do that in this unit. Is it a bad idea to go ahead and put the tank just a little to the side of the opening? second, not sure how to vent it correctly. Do I have to run a long pipe through the roof or can I just use a short stubby pipe and vent it underneath the rv?
  • tenbear's avatar
    tenbear
    Explorer
    Dec 05, 2013
    My black tank is offset and it works fine, looks like about a 45 degree angle. It is vented on the roof.
  • opnspaces's avatar
    opnspaces
    Navigator II
    Dec 05, 2013
    It's okay to have the 45 degree bend. The tank should be vented through the roof. I would think that the hole for the vent pipe (1 1/2 inch black ABS) would already be cut.
  • ScottG's avatar
    ScottG
    Nomad
    Dec 04, 2013
    My friend has a brand new Arctic Cat that has a 90 between the toilet and the tank. It works "OK" but stuff tends to sit there..
    (I have no idea why they did this. I have the exact same floor plan and mine is a straight shot. But I digress.)
  • GENECOP's avatar
    GENECOP
    Explorer II
    Dec 04, 2013
    Also install a black tank flush kit especially if your black tank is offset...
  • GENECOP's avatar
    GENECOP
    Explorer II
    Dec 04, 2013
    It's fine to have it offset, you just need to maintain proper pitch on waste pipe.....vent for black tank should go through the roof.....

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