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Thanks again for the helpful replies. It seems to me that I now have 2 options: 1. Try to bend the 8mm pipe, and see what happens... The reply from namsag suggested using an external bending spring. I've of using an internal bending spring before, I didn't know external ones existed -...

Thank you for the v quick and helpful replies. My experience of bending 15mm pipe is to put a pipe-bending spring into a pipe that has to be approx 1m long so that it can be bent round a knee. This relatively long length is needed to be able to apply enough force to bend the pipe. Then the...

I have a gas central heating system. The original radiators are connected by 8mm microbore pipe. The radiator in the extension (which already has a Drayton TRV4) is on 15mm pipe. I wish to put thermostatic radiator valves on the rest of the upstairs radiators. I was hoping to fit TRVs...