Flow & Return

[planemad]

When I purchased mu latest there was no boiler as it was ripped out by the previous owners before they were repossessed.

I have all the pipe work still there but I do not know what is the flow or return - i'm going to start fitting brand new rads and use Drayton TRV 4s.

Does it really matter that that I fit the TRVs on the same flow or return?

Cheers

 

[JPC]

not if you get bi-directional trv, which drayton trv 4 are

 

[planemad]

Are these OK to use

http://www.screwfix.com/search.do;j...tton.x=0&searchbutton.y=0&searchbutton=submit

They are stated as reversible flow - is this the same as Bi-Directional valve body.

 

[seco services]

look ok.
i've never used Siemens ones. they ar bi-directional, liquid sensor.

 

[mallyplumbob]

Fit Honeywell's mate, if you want a TRV as trouble free as you can get.
Either VT117 or VT200 models - both should be bi-directional.
Expect to pay around £9 +Vat & £15 + Vat
Well worth the money

 

[gas4you]

Siemens are a brilliant TRV and cheap to, around a fiver + VAT.

The only problem I have with them is that the tail is about 1/4" too long compared to others so can cause grief when fitting as replacements.

New installs no problems.