TRV Issue

littlerose12345

Hi All

Have a query, perhaps it's an obvious question..

Last night we bled and removed a radiator. The TRV was set to zero and so locked.

We then switched the heating on and for some reason water came through the TVR when it was off. Perhaps I'm misunderstanding how TRV's work but is that supposed to happen or is it faulty?

ktuludays

it does sound like the trv is cream crackered.

as you say you shut it off and it should not leak.

you said it was set to zero, is there another setting below zero. i'm sure some have a further setting for off, like a "*" or something similiar

Canucklehead

littlerose12345 wrote: »

Hi All

Have a query, perhaps it's an obvious question..

Last night we bled and removed a radiator. The TRV was set to zero and so locked.

We then switched the heating on and for some reason water came through the TVR when it was off. Perhaps I'm misunderstanding how TRV's work but is that supposed to happen or is it faulty?

Good morning: see this thread, Post 8 onward. More here.

HTH

Canucklehead

littlerose12345

Canucklehead wrote: »

Good morning: see this thread, Post 8 onward. More here.

HTH

Canucklehead

Thanks Canucklehead.. I remember we kept those when we had the rads fitted.

So with the cap in place, are we still able to use the central heating? Or are the caps a temporary thing while decorating for example?

Thanks for your help.

Wookey

If your removing the rad for any length of time and you want to be 100% sure of no leaks you can also cap the end of the valve with a nut and ring, small piece of pipe and a stop end. If the TRV has a union type tail piece you can remove it and fit a cap over the end of it using some ptfe tape. Some TRV's where supplied with flimsy plastic caps and overtightening them can make them spring of.

xenon2020

littlerose12345 wrote: »

So with the cap in place, are we still able to use the central heating? Or are the caps a temporary thing while decorating for example?

Replacing the TRV head with the plastic cap is usually used when the radiator has been removed to prevent the valve from leaking. Heating can be used with no problems and the valve should not leak.