Big John submersible sump pump for residential and light commercial use, the manual sump pump provides efficient and reliable service. Pump features a 1-1/2" discharge with an 18' maximum head. Cast iron motor housing is oil-filled for lifetime lubrication and rapid heat dissipation. Poly carbonate cover and polypropylene volute-base. Garden Hose Adapter included for utility use. Manual operation (pump easily converted to automatic operation using the RS-5). One year limited warranty.