Pressure relief value: finding a replacement

[damiandixon]

I have found that the pressure relief value, on my solar HW, has a very slight weeping. I suspect that that there was some debry left in the system.

Problem now is finding a replacement valve.

The plumbers merchant I use does not have any with a bleed screw. Any ideas as to a make that has a bleed screen so that we order one?

There are no real identification markings.

Either way I am just going to replace the pressure gauge.

 

[damiandixon]

Actually thinking about the question it's stupid...

The bleed screw is not needed at all, I can just turn the valve handle.

The question should have been: Can anyone recommend a 'pressure relief valve' manufacturer with a very good MTBF?

Thanks
Damian