Thanks Peggie. I'm sure you're right, but the tank was unvented by the PO

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and I've not put one in yet. It's problematic to install the fitting and I'm thinking I'd like to find a rigid tank to fit the space in the future. No problems with the ventless tank so far but again, we don't use the holding tank as much as many have to with our 3mi discharge and harbor pump out boat.

I ran out of hose clamps, I'll get more.

http://store.hamiltonmarine.com/browse.cfm/hose-sanitation-1.5-poly-x-gray-50-coil-169950-/4,27296.html

Messages In This Thread

I plumbed my holding tank and changed a few things.
- On the advice of someone here (thanks), I omitted my Y valve.
  - Having trouble figuring out the picture Tom
    - That's the discharge hose from the head Larry.
      - I don't think you need the vented loop. The pump discharge could be routed more direct overboard.
        
        You're right but I think for safety purposes, the loop should be there.
        
        It would pass survey.
        
        I wonder if those tanks were below the waterline like my boat?
        
        I think so because it's a closed system
        
        I think they're required close to the siphon source.
  - One BIG problem...
    - Thanks Peggie. I'm sure you're right, but the tank was unvented by the PO
- if the seacock is closed there should be no stress to the pumps valves
  - I was thinking that too Rich, then I remembered the anti siphon vent.

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