4-way ball valve, to increase the working pressure in the water supply line from the hydrant by interconnecting a centrifugal pump. This valve allows an immediate direct supply in case of undersupply of water. Pressure will be increased and supplied to the initial water supply line by switching over and creating a bypass with integrated centrifugal pump. There is no interruption in water flow. The valve can be used to shut off the hydrant supply by slackening the locking device of the handle.