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Dometic 4800 issues

Discussion in 'Technical Discussion' started by fishingtime, Aug 8, 2022.

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  1. fishingtime, Aug 8, 2022
    #1
    fishingtime

    fishingtime New Member

    Joined:
    Aug 8, 2022
    Messages:
    2
    Location:
    Puerto rico
    Need Help?
    I have a Dometic 4800 on my boat and when you flush water from the bowl comes gushing up; my Dometic dealer here in PR says he is clue less
  2. Sea Gull, Aug 8, 2022
    #2
    Sea Gull

    Sea Gull Member

    Joined:
    Aug 3, 2010
    Messages:
    165
    Location:
    CT
    It’s the built-in bidet option!

    We had that issue on our last boat. Not sure of the toilet part number, but had the same issue. We had them replaced under warranty as it was a new boat. I’m sure there’s a rebuild kit for the seals that would solve the problem more cheaply and almost as easily. For now, just close the lid before you flush.
  3. fishingtime, Aug 8, 2022
    #3
    fishingtime

    fishingtime New Member

    Joined:
    Aug 8, 2022
    Messages:
    2
    Location:
    Puerto rico
    Thanks; this is new boat also but they are lost here in Puerto Rico
  4. Capt J, Aug 9, 2022
    #4
    Capt J

    Capt J Senior Member

    Joined:
    Jul 11, 2005
    Messages:
    14,434
    Location:
    Fort Lauderdale
    You're vacuum generator is not making vaccuum. So you need to find that by either following the hose to it, or simply looking for it. It's a white box about 1' wide by 2' long by about 10" high.....it will have a pump on top.........Make sure the pump has power, there will be a vaccuum switch that turns it on and off (when it has enough vaccuum). If it continues to run, the duct bills are bad there are 4 of them, 2 in each hose end of the pump, take the hose end off. The bellows where the pump goes up and down can also be bad/split......... first find the pump and see if the motor is running (it also might be on a breaker that's off) What boat is this on and which head (forward,master etc etc)