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I've had some good help from this site so far regarding my radiator problems and I'm now ready to fit some TRVs when I drain the system today. However I'm worried about buying the wrong type of TRV for my system as my radiators seem to have very old and thin pipework. Could you take a look at...

Thanks for the info! See attached inside of the junction box, not sure how it can help as to me it's a complete mess of wires! (Sorry it's sideways it's how my phone uploads them and I can't seem to find a rotate button on the site). The one on the floor is more straight forward - it's...

Here you go...

Yep like that - they're called 'Lifestyle 2-port motorised valve', there is one underneath the pump on a pipe that doesn't go into the cylinder, and one on a pipe that come off the other pipe and goes into the cylinder about halfway up it. They've both got what looks like a switch with A - B...

I think you're getting a bit technical on me now lol. You can have hot water only, but you can't have heating only - the hot water has to be on for the heating to work, although I have no idea how the two are connected from a system point of view... I do know that there is a Grundfos pump...

Thanks Stem, most helpful! The only reason I wasn't going to bother with downstairs was because we don't really have trouble with the heat levels downstairs, if anything it's hard to keep it warm even when heaters are on constantly as it is a large open plan space and has a very large bay...

I've been doing a lot of research on heating systems recently, and for those that have seen my other topic I've been having trouble with a cold radiator which I think will need new valves. This has lead me to think that while I'm replacing valves anyway I may as well use the opportunity to...

Thanks for the replies everyone. It sounds like my best bet is to wait for when I drain the X400 and take the radiator off completely. I don't actually know whether it is is the feed pipe or return pipe that is affected as both sides have an identical valve! I'm still hoping it's just a valve...

My wife clearly has a better memory than I have and confirmed it was definitely working when we last had it on last year.

That's a good question and I'm not 100% sure if I'm honest as most of the time we have the radiators off in the bedroom. I'm pretty sure I would have noticed by now that it didn't work though as there have been occasions when it's got cold enough to want heating in the bedroom - I do have a...

I closed off all the other radiators, but not the hot water tank... I've tried bleeding it with both valves open and water spurted out, I tried bleeding it with both valves closed and the water soon stopped coming out. I closed the left valve and opened the right valve and water still didn't...

I've closed all the valves on the other radiators and they gradually went cold, the problem radiator which has both valves open stayed cold. However I have noticed there's a very slight moisture around the valve screw, not so much a leak more like condensation. It seems to be on both sides but...

Hi, I've got a problem with a radiator in the bedroom - it is stone cold, and the pipes leading to it and out of it are stone cold. It is an old conventional open system and all the other radiators are working fine - including the other one in the same bedroom (the bedroom has two windows and...