Drayton TRV4's

11 Jan 2010
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United Kingdom
Hi Guys and Girls,

So here's the situation........

Currently all of the radiators we have in the house (nine in total) are fitted with Drayton TRV4's. Should all the rads trip off having reached temperature we then have to rely on a relatively short bypass, which is installed near the boiler.

However when this situation occurs the boiler starts to bang, presumably due to overheating.

Rather than swap one of the TRV's for a straight pass through can we simply remove the head from the TRV?. Will doing this remove the thermostatic shut off and leave the circuit open should all the other rads trip off??.

Hoping you get my drift......

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yes, removing the TRV head will keep the rad open indefinitely, as long as the lockshield on the other side is open.... The noise isn't necessarily being caused by this tho, so use caution....... depending on your system it could be any number of things...

Worth a go tho....

PS: To be honest, I'd probably just replace the TRV with a mechanical valve anyway.....

That's just my thoughts :)

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system 'bypass'? How is it configured?
Are you on a 'y' plan or 's' plan or a Combi boiler?
More info needed before anyone can jump in with a cause.


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