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Leak from Pressure Relase Valve, after repleacing with new

Discussion in 'Plumbing and Central Heating' started by bigstan, 22 Oct 2005.

  1. bigstan

    bigstan

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    Hi
    I have a Worcester 24i and for ages now it has been slowly leaking from the 3bar Pressure release valve.
    After talikng to a few people "in the know" I have tried flusing a bit of water through (to get rid of a bit of muck) on many ocassions but the problem seemed to get worse.
    Eventually I tracked down a replcement part (genuine part) and have replaced this today.
    After taking the pressure back up to 1.5 bar, there is still a steady drip from the pressure release valve outlet which results in zero pressure after about 45 minutes.
    Any ideas anyone please? Advice much appreciated,
     
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  3. tomy

    tomy

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    It can only be your new part is faulty!!!!
     
  4. purplew1zard

    purplew1zard

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    How did you get the pressure bac up again....its all I need to know before I can start my weekend. Pls assist????

    Thanks

    John
     
  5. bigstan

    bigstan

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    Hi
    I got the pressure back up by turning a small "tap" that is on an 15mm inline valve on the mains water inlet to the boiler.

    I've used this a zillion times to put the pressure back up.

    I read somewhere about pressurising an expansion vessel, or pressurising the system a bit whilst it is "open". This seems a bit out of my depth so I'll try a new part again first, unless anyone has any other advice

    My thanks to the two who have replied so far.

    Only I could get a genuine replacement part that is faulty!
     
  6. Bahco

    Bahco

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    Does the valve leak at 1.5 bar or do you watch the pressure rise to 3 bar and then leak? :D
     
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  8. ollski

    ollski

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    I presume you fired up the heating before the new one leaked, yes?
     
  9. bigstan

    bigstan

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    Hi
    The valve leaks at 1.5 bar with the water cold

    but no I did not fire up the heating, this is all with electic mains to the boiler switched off, and the system cold, so there is no additional "heat" pressure.

    Any other ideas, I'm still fancying the new faulty part, but that's because I'm hoping it's that simple.
     
  10. gasgeezer

    gasgeezer

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    make sure the prv is shut by twisting it and let snap shut you can unscrew some and clean the seating.
     
  11. bigstan

    bigstan

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    Hallelujah!!!
    Thanks to all who have taken the time out to reply. I’ve been on two talk groups and the last comment from one of them sorted it for me. Unbelievable! Basically by opening the pressure release valve (PRV) and letting it snap shut hard a couple of times, I can only guess it has “seated” properly. Before this I was releasing pressure and letting the valve return lightly, the “snap” seems to have sorted it. So simple, but this is where “tricks of the trade” come in.
    Saved myself a few bob, and more importantly if whoever I brought in didn’t know this trick, then I could’ve been paying for a lot of hours messing about.
    I have put all the replies below as some of these suggestions may help others.
    My thanks again to all who have taken the time out to help.

    RELPY ONE
    It can only be your new part is faulty!!!!

    RELPY TWO
    if it still drips at 1.5 bar then its possible the pressure gauge is at fault.(giving a reading lower than the true pressure)

    MY REPLY TO ABOVE
    I'm going to try replacing the valve again first as another topic group have suggested this

    REPLY THREE
    Its more likely you have dirt in your system which is causing the new valve to fail to seat properly!
    Have you watched the gauge as the boiler heats up the radiators?
    Does the valve leak at 1.5 bar or do you watch the pressure rise to 3 bar and then leak?
    I presume you fired up the heating before the new one leaked, yes?

    MY REPLY TO ABOVE
    The valve leaks at 1.5 bar with the water cold
    but no I did not fire up the heating, this is all with electric mains to the boiler switched off, and the system cold, so there is no additional "heat" pressure.
    Any other ideas, I'm still fancying the new faulty part, but that's because I'm hoping it's that simple.

    REPLY FOUR
    make sure the prv is shut by twisting it and let snap shut you can unscrew some and clean the seating.
     
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