700X water pump control valve, is a check valve which installed on pump outlet of high rise construction and other water supply system, avoid fluid backwards.Before water pump will stop supply water, valve close around 90% slowly, to avoid happen counter weight and water hammer noise when pump stop suddenly; after water pump stopped, then valve fully closed, avoid pumping water backwards, so that effective pretect the water pump don't reverse by backwards fluid impacted. This product is a necessary pretect device for water pump outlet. Valve is streamline design, use solenoid valve's pilot control achieve accurate open/close, use safety, effectively avoid counter weight and water hammer noise, long life span, easy installation and maintenance.