Leaking pressure relief valve. Help!

Hi,

I have a CH system with a boiler that is integral to a Rayburn cooker (gas.) The system has a pressure relief valve rated at 2 bar, as per Rayburn's instructions. The fitter thought this was an unusual rating and apparently the value was hard to find.

The system has been in for about a year and I've had various problems with leaks. I thought I'd got them sorted but now there is a constant drip coming from this valve. I'm certain the system has never been anywhere near 2 bar, but I don't know why it has suddenly started.

I've been on the guy that installed the system, but he's unavailable for the next few days. (He's always been less than helpful.) He asked me to take a picture, which I did, but he's not replied yet.

I'm hoping someone here can help! I'm having to top up the system every half an hour or so at the moment

Here's the photo:



Cheers,
orval

Ok so I contacted the manufacturer and they said:

"I can confirm that it has indeed been installed upside down and that the valve will not work correctly in this orientation. It can only be installed right way up. It can be turned, though be aware that there may be debris now caught between the disc and seat and this may cause the valve to function incorrectly or still leak."

So basically I need a new one.

Does anyone know where to get a 2 bar pressure relief valve?

Thanks,
orval

That type of valve is £130 up depending on the thread size....ouch.
Does it have to be that type of valve ?
Aerohydraulics on 01555 893626 sell them.

If you can get away with a different type there's one here, it's half inch in and three quarter out, ask your installer if this is OK
http://www.advancedwater.co.uk/prod-227-468-0704.html

onecog said:

Does it have to be that type of valve ?

Click to expand...

Yes. See item (b) on page 18 of the installation manual.

It appears that the original one installed was £96 + VAT. So with that and the mention of £130 I don't understand how the Honeywell one is only £22. It can't be the same kind of thing can it?

Having half inch in would only effect the flow-rate not the pressure, so I guess it would be okay, given that there shouldn't be any flow!?

Damn. The Honeywell one needs to be installed "in the cold water supply pipework before the water heater". I need a valve that can sit on the flow from the boiler. Maybe that's why they are so expensive.