... Standard: BS, ANSI, DIN, JIS size: 1/2''-4'' structure:ball application:argricultural irrigation and ... agriculture, irrigation, industrial applications, etc. to the drainage systemoperation1)Easy to install, easy to operate2)Applicable to the regular operation, open and close quickly, ... 5)Each valve is pressure tested at the end after the factory, Lowest leakage rate 1/2"-4" pvc ball valve