UK Plumber Forum

[ceaton88]

I got woken by a loud bang in the night and the radiator valve appears to have exploded off leaving scattered parts nearby.

The heating was off at the time and had been for a few hours as it happened early this morn.

Does anyone have an idea what this means?

[REDSAW]

not seen that before

just unscrew the furled nut under the head and fit another.
perhaps the old one was cracked or faulty?

[ceaton88]

not seen that before

just unscrew the furled nut under the head and fit another.
perhaps the old one was cracked or faulty?

Thanks mate yeah after a bit more research I'm thankful its just the head that needs replacing!

[REDSAW]

A fault with a lot of TRV heads is that they are made of recycled plastic (thats why they yellow) and almost allways they get a knock or two from furniture or kids etc.
thats probably whats happened here, just waiting for the internal spring to blow it open.

[ceaton88]

Turns out it didn't even matter replacing the TRV head as the rad still behaves as if its fully open, confirmed by swapping heads from a known good rad in the house, could have saved myself the hassle of £10 and a trip to the store!

[REDSAW]

Turns out it didn't even matter replacing the TRV head as the rad still behaves as if its fully open, confirmed by swapping heads from a known good rad in the house, could have saved myself the hassle of £10 and a trip to the store!

Yes, but..
when the head is off it opens the valve fully, just past highest number ie; 5
problem with this is as a pro plumber, we have seen many a pin (the bit it pushes down to regulate) fly out of its seating leaving you a indoor black ink fountain six foot high!!!

leave at your peril- a plumber would be liable but is it worth it for a £6 fitting?

[ceaton88]

Probably not, thanks again