Pipelife Push-Fit Polybutylene Barrier Pipe Coil 15mm x 25m (276FH)

Using it with JG Speedfit fittings should be no problem. The OD of the pipe is 15mm. However, the plastic pipes do vary slightly in their ID and therefore you must use the correct pipe inserts. Do not use the JG inserts as they will be too tight and although you can whack them in with a mallet it will cause the pipe end to expand slightly larger than the proper diameter. SF does not appear to carry the matching PipeLife PB inserts. However, I have read that their FloFit PB pipe is actually manufactured by PipeLife so therefore the FloFit PB inserts should be ok to use.