The K2 Water Powered Back-up Pump is designed for as an auxiliary back-up sump pump for private residences in case your primary sump pump fails. It is not designed for and should not be used as a primary sump pump. It requires a connection to your city water system with a minimum pressure of 40 psi. The inlet pip should be at least in. in diameter. The pump can remove up to 420 Gal. per hour of water at ten feet of lift at 40 psi. The maximum lift of this pump is fifteen feet at 40 psi. At 60 psi, the pump can remove water up to 545 Gal. per hour at 10 ft. of lift. The manufactures warranty is 1-year.