Automatically turn on/off for your needs What's In The Box? 1x water booster pump 1x water flow switch 1x Brass fittings 1x User manual *PLEASE NOTE: When the pump leaves the factory, a small amount of water may remain in the pump. This is due to strict tests on the pump to ensure quality and meet the testing standards. This does not mean that the pump has been used. KOLERFLO 396GPH 21.7PSI In line Water Pump Best Choice For Home Water Pressurize Applicable to the duplex apartment,suburban villas,water heater pressurized,household water pressurized, and the solar water heater pressurized.Our water pressure pump especially suitable for water heater pipe pressurization with insufficient water pressure, to prevent water supply from being cold. Product Features: Easy installation, only need a wrench to connect the pump.Silence Working,almost no noise when it works.Powerful 120W Motor, High Quality Water flow switch and full brass fittings included. Copper Pump Head High quality pure copper pump head,No matter how long it is used, it will not rust High Quality Copper Motor Use 100% copper wire to ensure efficient and stable operation of the motor. Automatic FLow Switch Automatically adjusts to your needs,Increase the pressure of household. Stable Base Prevent pump from skidding and reducing noise during operation. Smart Control Box Smart Control Box,turn on the pump when you needed and shut off when you closed the faucet. Enough Pressure for Home Max Pressure: 1.5bar (21.7 PSI);Max Flow Rate: 396GPH(25L/min), Max Head: 49.2ft(15m). Two TIPS that require special attention when used it in a home pressure boost application: Check Value (buy separately) will be a better choice before the inlet of the pump if you use it.You'd better not exceed 40 minutes for one time,or it may affect service life of the pump.Suitable for 2 room(bathroom or kitchen) , 2 to 4 faucets. Connection size: G 3/4" on pump ports, G 1/2" on unions, suitable to 1/2" pipe. A minimum inlet flow rate of 0.6 GPM is required to ensure automatic starting.