Adding new radiator

[RedLeader]

Hi

I want to fit a new radiator to the existing CH system. The 22mm flow and return pipes from the boiler are buried in the concrete floor of my bungalow. Is it OK to T-off the 15mm pipes above the floor feeding an existing radiator?

Any help gratefully received.

Thanks
Red

 

[Dick Puller]

Unless you are fitting a very large radiator son, you'll be fine teeing off the 15mm F&R going to an existing radiator. A 15mm pipe can carry a 6KW + heat load.

 

[RedLeader]

It will be a very small rad as it is going in the loo.

Thanks for your help

Red

 

[Dick Puller]

Forgot to say Red; You need to ensure you have a two pipe system!!

If your house/system is no more than 20 years old you'll be fine.

 

[RedLeader]

The property was built in early sixties, I'm certain it has a two pipe system. Thank you

 

[Dick Puller]

No problem.

What a lovely part of the world you live in and the weather has been kind to you this Summer also!!

 

[RedLeader]

Dick, you have made me wonder whether I have a 2 pipe system. Is there an easy way to tell, by looking at the pipework around the hot water tank?

 

[Dick Puller]

If the system was installed in the 60's then it may be one pipe?!!
The best way to check is if there's a one pipe loop around the system & one pipe passing under the rads, with the radiator F&R connected to one horizontal pipe.

On a lighter note, here's a link to our Plumbers song, enjoy;
http://www.youtube.com/watch?v=uLvR7VMWCUY

 

[RedLeader]

Its not easy to check the pipes as they are under concrete, but there are two drain cocks for the system outside. I'm assuming that this indicates two pipes. Also I had a new boiler fitted in 2006 by a reputable company, am I right in thinking that it is against regulations to fit a new boiler to a one pipe system? Or am I talking out of my stopcock!

Thanks

 

[clf-gas]

If you have two drain off points terminating at the same point then this would indicate a two pipe system.

No, you can fit a condensing boiler to a one pipe system. If you couldn't then a lot of homes would find a simple boiler swap very expensive.

"Stopcock",,

 

[RedLeader]

ok, thanks. Duff info from another forum!!