• Welcome to PlumbersForums.net - The international free plumbing advice forum. Professional plumbers sharing advice with fellow plumbers and DIY alike. Register for free today! - Checkout the Plumbing Advice forum and then our Plumbing Videos area which still needs populating.

From the United States of America? - Checkout our specific plumbing forum for you:USA Plumbing Forum

Discuss Piping to replace Twin Entry Valve in the Plumbing Forum | Plumbing Advice area at PlumbersForums.net

Hi - I have the (apparently) dreaded twin entry valve radiators. I really would like to get rid of my immersion heater (to make additional room in a new bathroom) so I believe I can't have a combi boiler with these old twin entry valves. So I would like to re-route the outlet valve (that goes to the other side of the radiator) behind the radiator. I'm ok for upstairs as it's all floorboards but I have concrete floors downstairs. I have attached images of the pipe. For the pipe on the right hand side then I need to route it back towards the wall and then put a 90 degrees turn on it to route along the back of the radiator. Can anyone help please on how I would do that so it doesn't look to clunky - or should I just give up on the whole thing. I had thought about moving the immersion into the loft but I've read that's not such a good idea. And actually I like the idea of a combi boiler but I just need to sort out these pipes (I may get new rads also but I'd still have the same issue with how to re-route the pipe. Any suggestions greatly appreciated.


  • IMG_4669.jpg
    94.8 KB · Views: 6
  • IMG_4670.jpg
    58.5 KB · Views: 6


Staff member
S. Mod
Gas Engineer
The only really good way other than running it on the skirting is to lift the floor boards up and adjust it there

if your thinking of going for a combi get the heating engy to quote you for this change make sure you say where you want it eg under the floor etc

Reply to Piping to replace Twin Entry Valve in the Plumbing Forum | Plumbing Advice area at PlumbersForums.net

New Posts Threads Members