1.material:pvc ball lvalve 2.Size:1/2''--4'' 3.Standard: BSPT,ANSI,BS,NPT Production Detail Quick DetailsBrand: ZOOR ... resistance is small.6)No vibration, and no noise.7Each valve is pressure tested at the end after the factory, Lowest ... pool, wastewater treatment, agriculture irrigation, industrial applications, etc pvc check ball valve