Bulldog TRV's - short pin?

[sparkybird]

Hi everyone

Sorry if this is a dumb question, but I've had some probs with rads being cold at the bottom and wanted to check the TRV pin is not stuck. They are Bulldog ones - I can depress the pin and it pops out, but it's quite short and stumpy compared with others I've seen and I just wanted to make sure that this was a feature of these valves and there's not more of the pin stuck further in!

Many thanks

SB

 

[gas112]

yep they are short and only move a couple of mill , turn all your rads off and just leave one on at a time to force any air in system /pipework out if bottom of rad still cold its sludge and they need taking out and hosed out.

 

[Whitespirit66]

Try turning off some other rads to see if this one heats up. It's poss that your system needs balancing. Info available in FAQs or on the Tube.

 

[sparkybird]

Hi guys

Thanks for the speedy replies - very helpful. I don't think it's sludge as the rads are at the very top of the house (loft extension about 4 years ago) and it was power flushed for new boiler about 10 months ago.

The pipe at the TVR end is cold/cool and at the lockshield end is hot, so think it must be a balancing prob - will do as you suggest and read up on it, but I might be back for more advice!!

Cheers

SB

 

[sparkybird]

OK so turned off all other rads and the 2 problem ones heated up - so not sludge, but a balancing issue I think? I'm off to get a thermometer and have a go at rebalancing - wish me luck!

SB