... -1/2", 2", 2-1/2", 3", 4" 2) standard: BS, ANSI, DIN, JIS 3) with socket and threaded end ... weight, high strength Technical characteristics: 1) Easy to stall , easy to operate 2)Applicable to the regular operation , open and close quickly ... vibration and no noise 4)Quality : Heat ,durableApplication: Applies to swimming pool ,wastewater treatment ,agriculture ,irrigation, industrial application picture ...