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:x sorry to bring this up again - I didn't want to do the work so as to stay on the side of the law (also, this is in an apartment block so there is a higher level of responsibility if it goes wrong) So the plumber came round and said that they would change the pressure reducing valve...

So my girlfriend phoned a plumber, and they said that they think they'll have to replace the pressure reducing valve, at a cost of £160 (this is without seeing it) I don't understand why they can't change the cartridge? (it's like £30 or less) I thought that was the whole point. Even...

or anyone know if it is more likely to be the pressure reducing valve letting through static pressure, or the pressure relief valve just leaking?

seems fair enough, but i'll be mightly hacked off if someone comes round and replaces the cartridges and doesn't then check the pressure!!! Don't suppose anyone on here serves the Bow area? (in a plumbing sense) Would rather do that than play yellow pages roulette....

hmm, ok - so this is still subject to regulations then, even though it is the cold mains, not pressurised HW?

I see, thanks. I presumed it would be fairly simple. So you just turn off the water, drain it a bit, and then unscrew the black plastic bit and screw the new one in? Are the pressure testing points just for diagnostics, or are you supposed to test it when it is installed? Does anyone...

Hi, Essentially my question is: "Can I replace the cartridges on pressure reducing and pressure relief valves?" Here is my reasoning as to what the problem is: My girlfriends flat in Bow, London. Megaflo direct HW system, and water is running through the tundish. I tried the 'replace...