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I’ve posted a few times on here about plumbing radiators using plastic push fit etc.
My house is a 1930’s semi the central heating is all 8mm and 10mm copper microbore fed from manifolds off 22mm feed and returns.
What I found when I lifted the floorboards in the hallway has confused me somewhat.
There is a long run of 10mm copper from the manifold in the dining room all the way to the hallway which must be a run of at least four meters (8 meters there and back). The radiator is a large 1800 x 600 which is boiling hot and heats quickly.
Now for the confusing part, tee’d off this 10mm is a three meter (6 there and back) run of 10mm copper into the living room feeding an even larger curved bay window radiator, which also heats quickly and gets very hot.
I’ve just replaced the hallway radiator for a larger 1900 x 600 double designer radiator and just cut the 10mm copper and used push fit to connect 10mm speedfit to 10mm plastic and into the valves.
Again this heats quickly and is very hot.
Everything suggests that this shouldn’t work. How can a 10mm tee off onto another radiator and one long run in effect power two rather large radiators without issue.
Is this an anomaly or is all the research I’ve been doing wrong. My understanding is that you can tee off 15mm and run another radiator, but not off 10mm.
What’s going on ??
I’ve added a couple of pictures of the pipes tee’d off the pipe going to the hallway. The large pipe is a gas pipe.
My house is a 1930’s semi the central heating is all 8mm and 10mm copper microbore fed from manifolds off 22mm feed and returns.
What I found when I lifted the floorboards in the hallway has confused me somewhat.
There is a long run of 10mm copper from the manifold in the dining room all the way to the hallway which must be a run of at least four meters (8 meters there and back). The radiator is a large 1800 x 600 which is boiling hot and heats quickly.
Now for the confusing part, tee’d off this 10mm is a three meter (6 there and back) run of 10mm copper into the living room feeding an even larger curved bay window radiator, which also heats quickly and gets very hot.
I’ve just replaced the hallway radiator for a larger 1900 x 600 double designer radiator and just cut the 10mm copper and used push fit to connect 10mm speedfit to 10mm plastic and into the valves.
Again this heats quickly and is very hot.
Everything suggests that this shouldn’t work. How can a 10mm tee off onto another radiator and one long run in effect power two rather large radiators without issue.
Is this an anomaly or is all the research I’ve been doing wrong. My understanding is that you can tee off 15mm and run another radiator, but not off 10mm.
What’s going on ??
I’ve added a couple of pictures of the pipes tee’d off the pipe going to the hallway. The large pipe is a gas pipe.
