Copper pipework in older installations will probably be sized in imperial measurements – 1/2 inch, 3/4 inch, 1 inch etc. In fact these two sizes (1/2 inch and 15mm) can generally be joined using a 15 mm to 15mm connector.Click to see full answer. Similarly, it is asked, is 1/2 inch BSP the same as 15mm?1/2″ pipe refers to the internal diameter, 15mm pipe is the external diameter In my experience they are so similar that you can even use solder fittings without a worry, so using 15mm olives on 12″ pipe isn’t a problem.Also Know, what is 15mm copper pipe used for? 15 mm Copper Pipe 15mm copper tube is a versatile material and can be used in the installation of heating systems but can also be used to transport both gas and liquids. Likewise, people ask, what thread is a 15mm compression? 15mm compression fittings all have 1/2″ male threads on so these can b used without the nut and olive for certain jobs. The same is not true for 22mm, these do not have a 3/4″ thread.What is the OD of 15mm copper pipe?Both are external diameters. Wall thickness of 15mm is 0.7mm so internal diameter is (15 – (0.7 x 2 )) = 13.6mm. Wall thickness of 22mm is 0.9mm so internal diameter is 20.2mm. The above applies to standard half hard copper tube used in normal plumbing.
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