Plumbing

Swap 10mm pipe for 15mm

Anonymous user 03/03/2024 - 3.33 PM

I've recently changed a radiator in the bedroom. Successfully removed the old one and fitted the new one to the brackets on the wall. However, the old valves are still in place. Whilst these will work fine, ideally, I want to put new valves in. The pipes to the radiator are 10mm (microbore?), which means to put new valves in, I need some way of converting to 15mm. I originally thought that I'd use a 15-10 compression coupler. But, I popped the floorboards up and noticed that the actual runs of 10mm pipe are pretty short, and are teed off of the main 22mm pipe. Would I be better off cutting out the whole T joint from the 22mm pipe and fitting a new 22-15-22 T? That way, I could have a nice neat 15mm connection to the valves, and replace the horrible-looking 10mm pipe altogeter. If so, would a compression fitting work? Also, could I do this without fully draining the system, and instead just depressurise. I know there'll be some water left in the pipes, but I should be able to catch it. Finally, any danger in doing this to just one radiator at a time? We're planning on replacing all of the radiators as and when we can afford it.