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It is nessasary to have check valves installed on the shower inlets, since the shower head is not fixed and can draw waste water back into the hose when detached. Alternatively, you may be able to just have a check valve fitted on the hose connection to the bar, which hopefully will be...

Sounds like the expansion vessel needs refilling / replacing IMO, but there might be some additional issues, which the boiler engineer will look into. Not sure about the cost, but others can advise.

So the pressure on the gauge seems fine but the boiler is in lock-out showing an error code of .....possibly F75?

How is it leaking, what is it leaking on? Can you post a picture? Is it leaking on the pipework, for instance a soldered joint, or it it leaking from a screwed part either side of the valves? Help us out here....

Boiler make and model please. I assume you are noticing a full pressure drop on the pressure gauge on the front panel, not just a loss of half a bar?

Alot of people tend to go for the towel rail, due to the function that it provides. So you can heat the room before a shower and have a nice warm towel after you get out.

Are you saying that your current connection is via a 1/2" wall plate elbow? Are you looking for a reducing nipple 1/4 x 1/2"? Plumb center should have some.

So, you went to the trouble of getting a registered installer round to carry out the work correctly, then decided to carry out the rest of the work yourself? Unfortunately the flue is now your problem, unless you can get him back to rectify? When you contacted the installer, did he offer...

Not a problem. Just letting you know what it is so you can research it correctly. The noise is not supposed to happen like that and it sounds like the motor is on it's way out, or the wiring needs looking at, but either way, you know what the issue is & hopefully the plumber can just change the...

Good point! :oops:

You have highlighted a 3 port diverter valve, not a pump!

What pressure is your cold water supply to the valve?

If the 'cartridge' is a pull out type, once any retaining nut has been removed you will be able to just "pull it out". I am not talking about the valve itself, I assumed that much was obvious.

Have you tried to pull it out?

I doubt you will see evidence of water on your wall, since it will be heated water and most likely disappear by the time you get there, but yes, that is how the PRV works on your boiler.

If you have the ability to hydrostatically test, I would always do that in place of a pneumatic test.

Firstly, take the fascia plate off. You will be able to see if there are any more retaining grub screws. The cartridge should just pull out, it is held in place by a series of rubber o-rings along the shaft.

PRV is a pressure relief valve, stopping your central heating sealed system from becoming dangerously over pressurised and potentially causing you and your family a load of heart ache. When the pressure get's to a certain level, they are designed to lift and let the excess pressure out of the...

Well, the pressure dropping completely may be due to the PRV not seating back down after it has blown. I assume you have noticed the PRV has lifted? Any fault codes noticed? Have you diconnected your filling from the double check valve, to make sure it isn't passing? It could be a mixture...

Are you pressurising to 1.5 bar?