Self destructing boiler PRV?

[jmhill]

Hi,

I noticed that my Boiler was frequently losing pressure and found a drip from the PRV vent pipe. I bought a new PRV for £30 and installed it I tested it by opening it and now it to is dripping and the boiler is losing pressure. I've since read that these valves seem to leak after being opened once, is this true can I do anything about it or do I need another new one?

Regards,

Jon

 

[libby lou lou]

Take it out and clean it, that's only because it's new.

 

[Boilerman2]

Of course you system may be full of crud which is stopping the seat from sealing once it has been lifted!

 

[misterdubya]

Take it out and clean it, that's only because it's new.

Ignore that comment.

Look up FAQ's on Expansion Vessel re-charge. I suspect that may be your problem. To repair, unscrew the head, clean seating, re-fit head.

 

[jmhill]

Hi

Thanks for the help.

I can't find the FAQ anywhere I have found the boiler manual online (Ariston System A) but the recharge info isn't in there, any ideas?

The boiler is working but needs frequent refilling to keep the pressure up.

Regards,

Jon

 

[jmhill]

Found it now.

//www.diynot.com/forums/viewtopic.php?t=37170

Whoops, "NEVER use the Pressure Relief Valve to let water out of a system – it will leak afterwards!"

Why is this?

Jon

 

[Whitespirit66]

//www.diynot.com/forums/viewtopic.php?t=37170

Take the prv out, clean it properly, and whilst the vlve is out and boiler drained, check the exp vessel's pressure with tyre guage.

And don't play with the prv when everything is back together. They have metal to metal seat, and opening prv can cause crud to get trapped in the seat, and cause it to pass.

 

[Whitespirit66]

OP beat me to it! Getting slow in my middle age!

 

[jmhill]

Thanks will give it ago tomorrow!

Jon

 

[jmhill]

Carried out the recharge and cleaned out PRV, all working now with a dry vent pipe!

Thanks a million!

Jon

 

[Agile]

And don't play with the prv when everything is back together. They have a metal to metal seat, and opening prv can cause crud to get trapped in the seat, and cause it to pass.

Is that a special Ariston cheapo?

All the ones I see have a rubber insert!

 

[libby lou lou]

Take it out and clean it, that's only because it's new.

Ignore that comment.

Look up FAQ's on Expansion Vessel re-charge. I suspect that may be your problem. To repair, unscrew the head, clean seating, re-fit head.

Plonker, he wanted to save is £30 valve, that was his question.