Replacing a pressure valve

[Jever]

Hi all,

I have a hot water system with a tank on a direct feed so that the water main provides the pressure for the water flow.

The tank is discharging hot water through the tundish and a plumber has advised me that the problem is that the pressure valve needs replacing.

I've asked him to come and do it and even offered him money but he doesn't seem interested.

I'm now left wondering if I could tackle the task myself. I've looked at a few videos on Youtube but they all seem to be by Americans or Australians and their components don't look like UK ones.

Is a tank drain down necessary, or is it just a case of switching off the mains, taking out the old one, putting in a new one and then switching the mains back on again?

If it's a straightforward affair, can anyone advise on where to get a replacement valve? Will Plumb Centre have one?

I've attached a picture of the valve, I've Googled the product code and Google suggests it's a Caleffi 309 valve.

Would appreciate any help on offer.

Regards

Jever

 

[terryplumb]

You have an unvented cylinder and you can not work on it yourself. Not all plumbers can work on these ,you must engage a plumber who is G3 certified.

 

[ianmcd]

your plumber isnt interested because you need a G3 qualification to work on your cylinder, possibly he doesn't have it, it is definitely not a DIY job

 

[ianmcd]

snap