Central Heating Refill Valve Won't Turn

[Madrab]

If the valve is working and lets water out the top end of the flexi when the screw is turned then the check valve has to be stuck shut - the brass bit at the top that the flexi pipe connects to - or less likely, the check valve is on the wrong way, there should be an (spell edit) arrow on it, that should be pointing towards the copper pipe above it.

That's not a proper approved CH filling loop BTW rather something that's been cobbled together with normal plumbing parts and the check valve may have got gunged up. Can I suggest you get someone in to fit a proper filling loop, that will replace the screw valve at the bottom, the flexi and the double check valve at the top with a proper filling loop and that will also provide tap handles making it easier to use

This is the approved type you want

 

[budest]

Unless you've turned the valves off under the boiler, then that check valve could have failed. Try opening a motorised valve to manual too.

I think that has worked and the flexi wasn’t faulty at all. I was expecting to hear the gushing of water the way it does on my own at home. I will update you when the radiator is back on and bled. Thanks again.

 

[budest]

Ok guys thats it sorted. As you said, that flexi was the right one. I refitted radiator, bled it and then when I put the heating on and opened the shut off valve it refilled nicely. Can’t thank you guys enough! Legends.

 

[opps]

If the valve is working and lets water out the top end of the flexi when the screw is turned then the check valve has to be stuck shut - the brass bit at the top that the flexi pipe connects to - or less likely, the check valve is on the wrong way, there should be an (spell edit) arrow on it, that should be pointing towards the copper pipe above it.

That's not a proper approved CH filling loop BTW rather something that's been cobbled together with normal plumbing parts and the check valve may have got gunged up. Can I suggest you get someone in to fit a proper filling loop, that will replace the screw valve at the bottom, the flexi and the double check valve at the top with a proper filling loop and that will also provide tap handles making it easier to use

This is the approved type you want

View attachment 368559

Not wanting to hijack this thread..... A while back, I was, on the cuff, asked to top up a combi which had a braided cable and a check valve. Opening the ball/slot fixing made no difference, so I walked away.

 

[budest]

Unless you've turned the valves off under the boiler, then that check valve could have failed. Try opening a motorised valve to manual too.

One last question. I’ve topped it up too much to 2.5 bar. How to do I discharge some water?

 

[trojanhawrs]

One last question. I’ve topped it up too much to 2.5 bar. How to do I discharge some water?

Bleed a rad

 

[Stuckinarut]

One last question. I’ve topped it up too much to 2.5 bar. How to do I discharge some water?

As above bleed a rad or the magnetic filter

 

[budest]

Big THANKS to @Stuckinarut and @Madrab for their help on this. It was critical that I get the heating system up and running as walls needed dried for floor fitters coming. I really appreciate your time. Thanks also to @trojanhawrs. Good people do still exist in the world!