Central Heating Refill Valve Won't Turn

[budest]

I am trying to top up a central heating system having taken a radiator off for painting. However, the black handled won't turn. I have applied enough pressure to it and it still wouldn't budge and I'm afraid of applying further pressure and maybe breaking it. Any ideas what's going on and how I can get around it?

Thanks.

 

[Stuckinarut]

Tbh I don’t think that’s the valve you’re supposed to turn, it looks like the boiler isolation valve. Do you have any other valves further down? Can you post a photo of under the boiler pipework and above?

 

[budest]

Tbh I don’t think that’s the valve you’re supposed to turn, it looks like the boiler isolation valve. Do you have any other valves further down? Can you post a photo of under the boiler pipework and above?

I'm not at the property atm but will be back early in the morning. There are other valves out of picture tbh. I just assumed as it was beside the pressure gauge it was the correct one. Thanks for the response though.

 

[Madrab]

Certainly isn't the right valve - that's the valve to isolate (probably) the flow.

Looking at it suggests it might be an older Ideal Logic System boiler? If so you'll be looking for a pipe with valve(s) similar to this.

If it's not under/near the boiler then it'll be somewhere out on the CH, sometimes in and around the HW cylinder area.

 

[Mottie]

My mums one was under the sink!

 

[budest]

Hi mate. Thanks for the reply.

It’s a Logic System 18 gas boiler. The only flexi hose is lower down and seems shut off by default.

 

[budest]

Close Up of flexi

 

[Stuckinarut]

Close Up of flexi

That's the one, slowly open that slot on the bottom valve raise pressure to approx 1 bar and close

 

[budest]

That's the one, slowly open that slot on the bottom valve raise pressure to approx 1 bar and close

Thanks.

When I open it a 1/4 turn I’m just getting a weep from the screw.

 

[Stuckinarut]

Thanks.

When I open it a 1/4 turn I’m just getting a weep from the screw.

Probably needs changing then, but for now you should be able to top up to get it working and it should stop leaking when you close it

 

[budest]

Probably needs changing then, but for now you should be able to top up to get it working and it should stop leaking when you close it

Sorry I meant when I open it all I get is a weep. There is no water through it. I noticed at the top end of it the compression fitting has a nipple on it. Does that mean anything?

 

[Stuckinarut]

Sorry I meant when I open it all I get is a weep. There is no water through it.

Could be faulty then

I noticed at the top end of it the compression fitting has a nipple on it. Does that mean anything?

No, it's a verifiable check valve.

 

[budest]

The shut off valve on the flexi works as I took the top nut off connecting to the compression fitting and opened the shut off valve screw slightly and water came out. Is there something further up the line that needs opened?

 

[Stuckinarut]

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.

 

[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.

No I took a photo of how it looked before I did anything.