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epennal's avatar
epennal
Explorer
Aug 20, 2015
Solved

Grey water tank won't drain completely

New RVer here. My Grey water tank will only empty down to the 2/3rd level. Not completely clogged, obviously, but why would it stop draining at that point? I don't think it's a sensor issue because...
  • DOTLDaddy's avatar
    Aug 20, 2015
    This is what I would do if I wanted to check how much water it takes to fill up the grey tank:
    1. Drain grey water tank until no water comes out of sewer outlet
    2. Close grey water valve
    3. Get a bucket with a known fill mark, say 3 gallons
    4. Fill bucket to 3 gallon mark and pour down your shower drain
    5. Repeat as many times as it takes until shower starts to back up
    6. If it took 10 buckets, then you have 30 gallons capacity
    7. If it takes, say, 5 buckets until full, 15 gallons, then ya probably got a problem

    I am assuming your grey tank should hold at least 30 gallons, BTW.