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    • neilmcl
    • By neilmcl 12th Jan 20, 10:23 PM
    • 13,927Posts
    • 10,406Thanks
    Boiler Pressure Relief Valve dripping
    • #1
    • 12th Jan 20, 10:23 PM
    Boiler Pressure Relief Valve dripping 12th Jan 20 at 10:23 PM
    My dad's Worcester Bosch Greenstar CDi combi was playing up recently where it the pressure was dropping below 1 bar on a regular basis and then, having once again topping it up, started to constantly increase pressure into the red. We had to draw off a good few litres to drop it back down to 1 bar.

    Now it seems to remaining at a constant pressure but we've noticed that it's dripping from the pressure relief pipe outside, presumably the PRV had blown when it when into the red at some point. The boiler is a good few years old, possibly over 10 years, do we need a new PRV or is there an easy fix? Is there anything I can check before he needs to call out his plumber?
Page 1
    • JimmyChanga
    • By JimmyChanga 12th Jan 20, 10:33 PM
    • 261 Posts
    • 140 Thanks
    • #2
    • 12th Jan 20, 10:33 PM
    • #2
    • 12th Jan 20, 10:33 PM
    Usually the expansion vessel needs pumping up with air.

    The PRV may start leaking after it's deployed because the seal hasn't seated properly. Turn it a few times and that may resolve itself.
    Last edited by JimmyChanga; 12-01-2020 at 10:35 PM.
    • southcoastrgi
    • By southcoastrgi 14th Jan 20, 9:59 PM
    • 5,867 Posts
    • 3,369 Thanks
    • #3
    • 14th Jan 20, 9:59 PM
    • #3
    • 14th Jan 20, 9:59 PM
    Pump up the expansion vessel when he changes the prv
    I'm only here while I wait for Corrie to start.

    You get no BS from me & if I think you are wrong I WILL tell you.
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