District constant pressure water supply system

The utility model discloses a district constant pressure water supply system, including return circuit and the play water loop of intaking, it includes the inlet tube and the case of intaking to intake the return circuit, the case of intaking communicates a water loop, it goes here and there in proper order and is equipped with first outlet valve, folds pressure water pump, check valve, second outlet valve to going out the water end (W. E. ) from the end of intaking to go out the water loop, first outlet valve and intake and be equipped with a water quality detector between the case, the second outlet valve goes out the water end (W. E. ) and is equipped with the 2nd water quality detector, it goes out water end (W. E. ) intercommunication user pipeline to go out the water loop. Water in water supply system accessible time infories the surveillance center to report to the police after receiving the pollution, reminds the staff to maintain water supply system, a water quality detector and the 2nd water quality