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Hi mrgas, Thanks for your message. My concern is over very high heating bills and that the house doesn't get warm when it's very cold outside. The house is modern (built 2005) the boiler is a Potterton Promax 24 HE, but bills are more than double what they were in out old house. I've...

Hi Agile, Thanks for your reply, that's why I'm here to get an understanding! The order of my diagram is correct, the spacing may not be, but everything is within approx. 30cm of pipe work to each other except the boiler which is approx. 5m on each the feed and return away from the airing...

I don't mean close the current valve, I mean add a new isolation valve in the red dotted area of the diagram (across the bypass area) to make it a conventional layout.

Thanks for everyone's replies so far! I get the feeling that the majority think it shouldn't be there, but I'm a little concerned that a minority think it's ok. The last thing I want to do it block it and cause more issues. I'm considering cutting into the red area and adding a 22mm isolation...

Morning all, sorry for the delay, it's really difficult to take a meaningful photograph as it's a bit of a maze of pipework - easy to trace when you can keep moving your head around, difficult from one angle, and from multiple photographs, every pipe looks the same! I've attached a photograph...

Hi guys, thanks for your replies. Simond, that's 100% how it is, it seems totally bizarre to me! Dan_Robinson do you think that having it there is correct then? What stops the water simply circulating in the small loop and never going around the radiators?

Hi all, I have a system boiler with a Megaflow hot water tank and quite a few radiators (approx. 16). My boiler seems to be pretty conventionally plumbed in except for one small bit of pipe. I've marked it with a red dotted line on the drawing below: I don't understand what purpose this...