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  1. #1
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    WhiteLotusLane's Avatar
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    Water pump issue

    I have an issue with a water pump that's supposed to maintain good pressure at all taps in the house.

    The pump only turns on when the pressure drops to really low, much lower than I would like to maintain. So if you open a tap, initially the pump doesn't turn on and a trickle of water comes out. Then after 10 seconds or so the pump finally decides to turn on, and then the pressure improves a bit and more water comes out. But just about when it gets to a pretty reasonable pressure, the pump switches off again and water gradually reduces again back to a trickle..

    Could this just be a case of adjusting some pressure setting?

  2. #2
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    oldgit's Avatar
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    Has it always been like now? it no, check the filters for muck slowing the flow and clean.

  3. #3
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    Top of the pump is a round plastic cover about 4 inches high and 2 inch diameter, 1 screw holds it on, under that is an adjusting screw for the pump pressure.

  4. #4
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    Mine says "do not attempt to adjust"

    the pressure switch is a replaceable item and not expensive

    if the pump was working fine and then suddenly started giving problems, that is usually the cause

    if the problem has been slowly coming on, then another problem may be the cause

    get a pump man in
    I have reported your post

  5. #5
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    Sounds like you need an accumulator...or whatever the word is in the water world...A reservoir that is between the pump and the system that holds enough water to keep you happy and the pump happy. Depends on the type of pump you have as to whether it is an integral fit or not...

  6. #6
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    ^ well, if it has been working well for ages, probably not

  7. #7
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    Quote Originally Posted by oldgit
    Has it always been like now? it no, check the filters for muck slowing the flow and clean.
    also possible

    if the outlet is partially blocked, that would give an apparent false high pressure reading to the pressure switch

    then it wouldn't switch on quickly nd would turn off sooner than necessary

    but blocked outlets are rare

    if you can isolate the pump from the house, you can check it better

    cut the outlet pipe somewhere near the pump and fit a valve (or maybe there is already one there, so cut after that)

    close the valve, switch on the pump, open the valve

    check the flow rate

  8. #8
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    I don't know what brand you have but if you take the top cover off you will see a square cast box with a brass screw this is the adjustment for the amount of water used before the pump will kick in again it needs to be screwed in or out to suit. You should have a book showing this. I'm away from home or I would scan and send.

  9. #9
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    Air leak could be another reason. The pump runs off pressure, if there is a leak in the fittings or line, the pressure will not hold causing the pump to turn off and on

  10. #10
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    ^ yes, but that is not his problem!!

  11. #11
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    It's a new house (to me), but old pump. Will likely need to get a pump/plumbing guy in anyway, but it's good to know that there is a place to adjust it (or to replace the pressure switch).

    Thanks!

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    Step by step approach, what water supply do you have? Are you running the pump directly from the mains or do you have a tank?If you are running direct from the mains check the incoming water supply. If that is ok the you could fit a T piece in the outlet by the pump with a valve on it and then just open that to see the response from the pump. If it works ok then I suggest you check the taps in the bathroom, taps in THailand are known for corroding up inside. Another thing if your problem is the shower short of water then check for the small round filters in the inlet hoses of the shower.

  13. #13
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    Mains go into a tank, which is full. Will check out all the plumbing I guess; it's an older house, so may just need some maintenance.

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