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Intermittent Hi Pressure Faults

Discussion in 'HVAC' started by Capt Ralph, Nov 6, 2022.

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  1. Capt Ralph

    Capt Ralph Senior Member

    Joined:
    Sep 8, 2004
    Messages:
    12,649
    Location:
    Satsuma, FL
    I have been chasing intermittent hi pressure faults on our friends Hatt for a few months now.

    Half of the boats systems run from one pump, strainer, sea-cock, hoses and water manifolds, the other half on their own pump and stuff.
    Just the systems on the one set up has this problem.
    I would stay on the boat all day and it never would fault. The owner returns and one would fault within hours.
    I was starting to think he was possessed with an A/C curse.
    Thru the months of headache, rotated pumps, strainers and re-arranged a manifold.
    Every time thought I got it.
    Then one of the units would cycle and finally fault off line, hours later, with the owner onboard.

    Then I saw it, the water discharge fluttered for a second. Knowing it was not the pump, I cut a hose open.

    Hose Pox.
    The inside of the hose was de-laminating.
    All hoses replaced. Owner onboard 2 days now. All good.
    hose pox.jpg

    I have found this before on engine raw water supply hoses, I kicked my self for not thinking of this earlier.
  2. boatpoor

    boatpoor Active Member

    Joined:
    May 4, 2016
    Messages:
    213
    Location:
    32407
    I've had a couple of fuel supply hoses do the same thing. The inner liner collapsed under vacuum and wouldn't allow fuel to flow.
    Capt Ralph likes this.
  3. Capt Ralph

    Capt Ralph Senior Member

    Joined:
    Sep 8, 2004
    Messages:
    12,649
    Location:
    Satsuma, FL
    Yep, ship happens.
    !cid_01b301d651b0$5a3dc5a0$1401a8c0@RC77.gif
  4. johnnry

    johnnry Member

    Joined:
    Jan 21, 2017
    Messages:
    66
    Location:
    Babylon ny
    PS what year boat,A/C system was that?? so florida use?? thanks