... high quality, good looking, long service double union copper ball valve, available size: 20mm, 25mm, 32mm“Seher” ... , it is more technical and economical than copper pipe, UPVC pipe, PEX-AL-PEX pipe ... healthy and environmental, can be used in pure water supply system.2, Heat-proof: the ... copper insert fittings.8, Long service life: the pipe system can be normally used in 50 years or longer. PPR copper ball ...