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post #1 of 7 Old 04-09-2013 Thread Starter
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waterline leak

I have a very small pressure leak in my Morgan 33 fresh water system. I know its there because when things are quiet I hear the pump cycle on for a few seconds every 20 minutes or so. Am pretty sure issue dates from replacement of a 1 to 3 fixture but the clamps seem tight. Maybe pulling on the lines caused a problem elsewhere. Any bright ideas would be most welcome. Its typical sailboat, nothing is easily accessable.
like a pebble in your shoe its no big deal but annoying.
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post #2 of 7 Old 04-09-2013
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Re: waterline leak

Do you see any water accumulating anywhere? If not it may just be seeping past the check valve in the pump and returning to the tank. (I installed a seperate check valve in the suction line because of this very reason a while back.)
Hope you are luckey enough that this is all it is.....

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post #3 of 7 Old 04-09-2013
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Re: waterline leak

Just been there... had to replace quite a few hoses to fix it. When the flexible hose gets hard, it doesn't seal well on hose barbs. I had a leak from a t that was running down the wall it was touching.

I'm afraid you just have to go around with a flashlight, and feeling with your fingers, in search of the leak.

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post #4 of 7 Old 04-09-2013
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Re: waterline leak

Try putting a small piece of paper towel under every fitting and all low spots. The spot that is wet is the leak.
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post #5 of 7 Old 04-09-2013
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Re: waterline leak

If its a pressure sensitive pump, it could be the diaphragm leaking.


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post #6 of 7 Old 04-09-2013
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Re: waterline leak

Another possibility:

If you have an accumulator tank, you may need to purge & re-pressurize it.


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post #7 of 7 Old 04-09-2013
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Re: waterline leak

I would also suggest that the pump might be a problem. If you don't see any water accumulation than the pressure switch or diaphragm might be the problem. Chuck

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