pressure Relief Valve change

Discussion in 'Plumbing and Central Heating' started by nkeegan, 23 Mar 2011.

  1. nkeegan

    nkeegan

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    Hello everybody I have a boiler question I'd love help with if possible?

    My pressure relief valve is dripping, constantly, and I need to replace it.

    My concern is if I shut off the boiler isdolation valves, when I re open them I will get a leak which will be bad!

    Is there any good way to replace this valve - or should I just drain the system via the faulty pressure relief valve until the flow stops and the system is drained enough?

    Thanks in advance

    Neil
     
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  3. lightning

    lightning

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    While your systems drained pump up the expansion vessel to 0.8 bar or what the mi's say pressure should be
     
  4. misterdubya

    misterdubya

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    Do exactly that. What is the make & model of your boiler?

    Mr. W.
     
  5. nkeegan

    nkeegan

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    thanks - it is a ferroli falcon. why did you wanna know that mate?
     
  6. misterdubya

    misterdubya

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    Some PRV's can be bu@@er to change. Yours is pizz easy though. Remember to check the Expansion Vessel's pre-charge pressure with the old PRV removed. - as lightning has already said.

    Mr. W.
     
  7. nkeegan

    nkeegan

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    thanks for your help

    would you advise any compound or ptfe tape or new washer when fitting new one?


    are some fiddly to get access to then?..
     
  8. nkeegan

    nkeegan

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    also, any good spanner (size etc) to access and undo the nut as it's at the back a bit!... or will a normal wrench do? cheers for your help I really appreciate it all.
     
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