Automatic switch: The automatic switch adopts electronics theory , controlled by water current . It boosts pressure automatically when the tap is on , and turn off when the tap is off . It is used conveniently , and also saves power. Technological innovation: This pump solves the problem of inadequate water causing no lit Fire because when the tap water is of low pressure , the pump can boost pressure . It can also boost pressure for solar water heaters , boost pressure and circulate water for industrial equipment , and increase oxygen for rearing ponds or fish tanks. Widely used: GR hot water pump boost pressure and circulate hot water for boilers besides above using. GR hot-water type also can be used for circulation and pressurization of hot water. 15GZ best feature is that it can suck tap water from one or two floor below directly. so it completely solves the problem that the higher floors don't have water while the lower floor has. Material: Its copper pump body , copper impeller and stainless steel shaft are corrosion-resistant stainless . The whole pump is sealed well,total suction lift is high Flow rate is large. Easy to use: It starts well , switches sensitively and automatically , and produces low noise . It also is designed to be low temperature , small volume , delicate appearance and long-time using ., Manufacturer: Levkitch