plumbing dilemmas...a request for advice.

[madge1]

it's a brand new pump. When we extended the kitchen we replaced everything

Could it just be a case of replacing the existing TRVs with ones specific for single loop? Expensive, but obviously cheaper than a few new pipes

 

[TeaTime]

Have you tried increasing the pump rate?

 

[madge1]

I believe it's on the maximum anyway - we've had the engineers out a lot to have a look

 

[TeaTime]

creating a seperate circuit should slove your problem then. Provided you can do the nessasary pipework modification without disturbing those lovely floors.

 

[madge1]

it will be fine for those two rads yes. As long as it doesn't affect the others on that circuit

Changing the old TRVs to full bore on the single loop (at £40 each...) would be 250 quid, plus fitting.

cheaper - but no guarantee of success.

many thanks for your help

 

[TeaTime]

Have you got standard TRVs fitted then?

 

[madge1]

to be honest I'm not sure. I've just emailed the heating engineer, but it wouldn't surprise me.

 

[TeaTime]

They have to be TRVs for single loop systems, otherwise they will not work properly.

 

[madge1]

but would that manifest itself in this manner? I'm guessing it would, if the flow was restricted. Could well turn out that all of them are, except the one on Bedroom 3 (say), which is therefore stopping the flow to bedroom 4 and the study.

 

[TeaTime]

You need a good flow on these one pipe systems, if the flow is being restriceted by use of wrong TRVs on all the rads then you are likely not getting the heat out of your system that you should.

 

[madge1]

okay - step #1 then is to get the HE to establish all the TRVs are full bore. Then potentially down the extra piping route. Could be fun.

Many thanks again for your help

 

[TeaTime]

That would be a good starter for 10.