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I was wondering that too.

Just wanted to say the more I think about it the more I know you’re right. Theres no way a TRV can regulate the temperature that way. The way they work is more like an on off switch. Eventually the rad is going to get up to the same temp as the system water.

The surface temperature of the chrome ones certainly gets much hotter.

Just thought, if you decide to use a sweep T makes sure it’s not a black iron one. Stainless or copper only on potable water.

I’ve only ever fit grundfos return pumps. That one you posted a link to is only 1/2 inch. It would be better to use a grundfos with 3/4 pump valve unions. A better flow rate will be attained.

No because heat rises. The hotwater displaces the cold. Remember cold fill goes in the bottom of cylinder and the draw off to the taps is at the top of your cylinder regardless if you have a return pump/circulater

Rothenberg do a gel in a spray bottle that stops heat traveling up the pipe. I guess it absorbs the heat. Comes in handy sometimes too.

Return pipes usually are the best place to fit magnet filters. Closer to the boiler the better.

Must of got that wrong mate. Just replace it like for like size if you’ve had no issues with the room not being a comfortable temperature. There is more to take into consideration when calculating rad sizes than just height and length of a room. Windows such as double glazed for example.

Rothenberge do a gel. It’s in a spray bottle and it prevents heat from traveling up pipework. I’m guessing the gel absorbs the heat. It does actually come in handy sometimes but for the life of me I can’t figure out why you would want to accomplish what you say.

Mate that’s genius.

If it’s an S plan it’s possible that the central heating zone valve is seized in the open position. They may have fit a new boiler but the zone valves were not replaced.

Unsure what you mean regarding those?

I like it.

I noticed on certain TRVs you can do that also. Before you fit the head you can adjust the flowrate,lock it off then fit the TRV head. An anti tamper TRV

You’re r bang on right mate. No numbers or temp settings on a lock shield valve though. Plus lockshield valves are not made to be constantly turned on and off or as we all know they start to leak.

You too mate.

Let’s not forget what we were on about here. And that was why he should or shouldn’t have a TRV on a chrome towel rail. CHROME towel rails get hotter because of the simple fact they are chrome. Room temperature is mainly caused by the temperature of the radiator or in this case the towel rail...

I 100% think that is the best thing to do.

I know what a thermostatic mixer valve is. They started putting them on new builds specifically on bath taps as people were running baths on max and leaving them. There were a few reported cases of kids jumping in and scalding themselves. I mean TRV on towel rails because towel rails get hotter...