Hi all, Just want an answer to a mystery please if possible. I replaced a Drayton thermostatic valve because it was leaking what appeared to be blood coloured liquid. I was told it was probably a broken thermostat so I bought a new one Friday. Now this one is doing the same!! The liquid is actually red, like blood! Is this a coincidence or is there something going on with the radiator/system? Thanks in advance!
Additive in CH system? Leaking from TRV or pipe. Which Drayton trv you, some have a wax sensor, others a liquid sensor.
Try bleeding (unfortunate term in this isstance) a bit of system water from a bleed screw at the top of the rad. If it comes out red, then you know where it's coming from. But, unless you have some seriously unpleasant poltergeists in your home, this red will almost certainly be coming from the TRV itself. So, take it back and try again. Only this time don't install it using a club hammer.
Thanks I have just bled the rad and the water is clear. Hopefully it is just a faulty TRV but very strange it should go as soon as this as it was only bought Friday!
Mystified by this, as that TRV has a wax sensor, not liquid sensor. That photo has me confused, is that red liquid or has it gone to a solid? You have orginal TRV that's leaking red, now a new replacement, definitely not from same batch, I'm at a lost for answer, how hot does that radiator get.
The red liquid in photo looks more like something that has been spilled on the valve rather than leaked from it.
That's what I'm thinking, if ejected from TRV, then there would be red blobs on wall behind. Looks more like something been poured down/ over TRV.
The old TRV that was replaced was disposed of and the new one fitted carefully, no club hammers! Nothing has been spilled or poured on this or the old one. The liquid is quite thick but has not solidified. I will return it to Screwfix but will give Drayton a call to get their thoughts.