Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie
Hi there,
There is an issue with role permissions that is being worked on at the moment.
If you are having trouble with access or permissions on regional forums please post here to get access: https://www.boards.ie/discussion/2058365403/you-do-not-have-permission-for-that#latest

Booster pump starts/stops by itself

  • 28-11-2010 11:11pm
    #1
    BullBauld
    Registered Users, Registered Users 2 Posts: 850 ✭✭✭


    Folks

    I put in a Grundfos booster pump recently and it has been working fine.

    But since last Thursday it has been kicking in every 15 mins or so for no apparent reason...no tap etc being used.

    Could a leak cause this to happen?

    I am at a loss what it could be and it's driving me slowly mad. Any ideas what could be the problem?

    Thanks
    Bull


Comments

  • #2
    JohnnieK
    Registered Users, Registered Users 2 Posts: 2,526 ✭✭✭JohnnieK


    Is it a negative head pump (small little expansion vessel attached to it)?


  • #3
    BullBauld
    Registered Users, Registered Users 2 Posts: 850 ✭✭✭BullBauld


    Yes thats the one Johnnie. What do you think it may be?


  • #4
    FoxT
    Closed Accounts Posts: 4,204 ✭✭✭FoxT


    It sounds like you have a leak on the High pressure side. When you turn off the tap etc the pump halts , but after about 15 mins or so the pressure on the HP side falls, triggering the pump again.

    This could be a water leak, or it could be backflow into the pump itself ( The pump outlet will have a non-return valve and there could be come backflow here) Backflow could be caused by a faulty valve or possibly a small particle of dirt preventing the valve from closing fully.

    or, it could be a small leak in the little expansion vessel.

    Given that it worked fine for a while I'd guess it is dirt in the valve.


    I'm not a plumber though!


  • #5
    roc1980
    Closed Accounts Posts: 9 ✭roc1980


    had a problem like this a while ago and it turned out that
    the ballcocks in the toilet were passing ever so slightly
    check if your toilets have a valve going to the cistern if so
    turn off valve and check if pump stops then


  • #6
    JohnnieK
    Registered Users, Registered Users 2 Posts: 2,526 ✭✭✭JohnnieK


    BullBauld wrote: »
    Yes thats the one Johnnie. What do you think it may be?

    If you had a leak on the high pressure side you would know about it. The ball cock in the toilet could be a feasible problem, personally I would be looking at the little expansion vessel. You would have to check the charge on it. This can be done with a foot pump with a gauge on it. There is a valve on the vessel that looks like a tyre valve. Turn the pump off and open the taps, then connect the pump to this valve and check the pressure, it should be 0.9 bar. If it's not, you will have to pump it up.

    Check for leaks though i'm sure you would have noticed one before now with a 2 bar pump.


  • Advertisement
Advertisement