1/2 inch for 1/2 inch pipe.
Most lumber yards should have it.
I have a new copper pipe not been used who do I sell it to? Or who would buy it off me as 'm moving house and want to get rid of it.
That's going to depend on: -- the thickness of the pipe's walls -- the length of the piece you want to buy -- the material of which the pipe is composed -- where you buy it
Depends on what youwant to do with the inch. Length and Conversion to Metric: There are 25,4 mm in one 1 inch If you want to buy it you would be stupid ;-).
Buy a 1/2 inch female iron pipe angle stop with a 3/8 inch compression outlet.
Buy a 3" MECHANICAL COUPLING at any hardware or plumbing store. Made of rubber and has hose clamps.
China is a large country to export steel pipe, if you want to buy steel pipe, you can import from China.
Any plumbing supply and it comes in galvanized steel , black steel, Brass
In any plumbing supply store, but not usually in hardware stores which generally stock up to 3/4 inch, not 1" or more.
It depends on where in the world you want to buy it.
You could cut the pipe where you want, then go to auto parts store and buy a slightly larger flare then whats already on it. Fit the flare over the pipe then clamp it or weld it. Continue to flare out until the desired width then run your pipe. You can usually buy this all at auto zone or advanced auto.
Apple no longer produces a 20 inch iMac. You would have to buy a used one to get a 20 inch model.