... material, high quality, good looking, long service It is double female thread plastic ball valve, available size: 20mm, 25mm, 32mm.“Seher” PP-R ... project, it is more technical and economical than copper pipe, UPVC pipe, PEX-AL-PEX pipe, PEX pipe and PB pipe ... system can be normally used in 50 years or longer. double female thread plastic ball valve