... /2''--4'' 3.Standard: BSPT,ANSI,BS,NPT Brandzoornamepvc ball valvematerialpvc or pprsize1/2"-4"standardANSI,JIS, BS, DINapplication ... , industrial applications, etc. to the drainage systemoperation1)Easy to install, easy to operate2)Applicable to the regular operation, open and ... , and no noise.5)Each valve is pressure tested at the end after the factory, Lowest leakage rate "ZOOR" plastic ball valve