Fitting New Towel Radiator

anotheruser

We have a small towel radiator so I was going to fit a bigger one.
Is it simply a case of turn the water valve off, take the old one off and put the new one on?

We have a hit water tank so it should automatically bring water into the system to keep the correct pressure.

Cheers

anotheruser

As a side note, Screwfix have loads of different ones:

https://www.screwfix.com/c/heating-plumbing/towel-radiators/cat830996#category=cat830996&productwidth=400_mm

Taking the top two, how come they're so different in price?
I don't see much different in the descriptions

molerat

The expensive one is electric.

nofoollikeold

1. Having a hot water cylinder doesn't mean that you necessarily have a central heating header tank, you could have sealed system with an expansion vessel. If so you would have to re-fill manually after replacing a radiator.
2. To replace a radiator you would probably need to drain the system down below the level of that radiator. The alternatives are "bunging" the header tank (f you have one) or freezing the flow and return pipes to the radiator.
3. If you are going to fit one which is taller, but the same width (between the centres of the flow and return pipes) AND has the pipe centres the same distance from the wall, you should get away with turning the radiator valves to fully closed, undoing the connection between the valves and the radiator (NOT the connections between the valves and the pipes), draining the radiator, removing, fitting the new and re-connecting the valves.
4. If the new radiator is wider, narrower or has pipe centres a different distance from the wall, you won't be able to do it as 3. above, so will probably have to drain the system.

womble12345

Assuming you go for one the same width as existing then your pipework should be fine, assuming you have valves each side then turn them off and take the radiator off making sure you have something to catch all the water in, then put the new one on, turn the valves back on and open the vent plug at the top to let the air out as the rad fills (thats also assuming you have an open filler tank with ballcock in the loft).