metric

Got an old stone house, other than getting a micrometer what clues give away metric or Imperial pipe. The copper looks really clean but it's been under the floor so that might mean nothing. House is like an onion, I really need to stop peeling, pulled a load of lead pipe or so at least I'll get...

How do I connect a 15mm pipe to a 1" diameter male "O" ring type fitting? See photo. I am replacing an Imperial radiator in a single pipe system with a metric one which is quite a bit shorter. I have bought a 1/2" Danfoss Randall RA-G Single Pipe TRV Body which comes with a chrome fitting...

Hello, I have a radiator in my sons bedroom that is old and has actually started to leak through the bottom, which has a small section that is rusted through. I presume it's imperial radiator, since when I measure it, it doesn't seem to be of any standard size. If you check the 'radiator'...