Bathroom radiator hot on both hot water and central heating...

[Aaron]

Hi all,

Could someone with a little more experience than me please confirm my understanding, as I have not seen many of these in the field.

I have heard that some systems, particularly older systems, tee in the bathroom rad into the primary circuit. Is this done simply by teeing into the primary flow after the pump, but before zones, as per the image? In addition to this, is the return piped correctly, as per the image? If so, I am guessing the bathroom rad is simply acting as a large by-pass valve...

Thanks in advance...

 

[brum]

Yeah I've seen it done like that I thought it was very strange because it could short circuit heating in my opinion...brum

 

[ShaunCorbs]

Correct

 

[S.P.S.]

Correct, sometimes called “summer heat” you will normally find a gate valve as a balancing valve so not to completely bypass the system.

Personally I think it is a great idea, as towel rads in bathrooms are able to dry towels all year! I’m not talking an 1800x600, mind.
Then a separate panel rad to heat the room in winter.

Generally only in bigger bathrooms.

Last year we did a large project and 3 of the bathrooms had this set up. Very nice job indeed

 

[Ric2013]

Bathroom slightly spoiled by white pushfit connector under WC cistern IMO. Picky or what lol? But very nice, and I do have a soft spot for panelling.
Re. the original question, yes, sounds about right. If that's how it's plumbed, with the return tees and flow tees not in the same order, then there is a risk of gravity circulation up the central heating return pipe, depending on the precise layout of the pipework (symptom would be a slight warmth in CH radiators). But if it works, then it's fine.
I think having the bathroom radiator on its own circuit as you have is a very good idea: in spring and autumn it can very often be too cold for the bathroom when the rest of the house is at a perfectly acceptable temperature.

 

[Aaron]

Thanks for all the replies, guys. Much appreciated...

 

[townfanjon]

Bathroom slightly spoiled by white pushfit connector under WC cistern IMO. Picky or what lol? .

Yes , lol . Those pushfit connectors are the dogs pal , far better than a fibre washer that could last one week or twenty years .

 

[S.P.S.]

I never normally allow any pushfit to be seen, but those connectors are far too handy much easier to future maintenance!

 

[ShaunCorbs]

You can get them in chrome can't you ?

And only problem I can see is you need to remove the chrome plating

 

[S.P.S.]

You can get them in chrome can't you ?

And only problem I can see is you need to remove the chrome plating

Yeah chrome ones would have been a better shout, but il take that one

How do you know it’s not?

Abrasive strip the last 18-20mm and nothing shows