... automatically, to achieve unmanned automatic pressure controller for water pump detail information : Product Specifications:Available for water and pressure control systemsTurn on/off ... , 1.1 to 1.8barCoverage: USR, CNR-enclosed, double pole, single-phase pressure operated automatic switchTesting standard: UL standards 508 of ... , 20A/230V, 2.5hp 12A /230V, 3.0hp, 17A Pressure Controller for water pump