Pipe pumps are also named pressure increasing pumps. If some place, the water pressure is too low, and we can use this pipe pump to increase the water flow speed and capacity. This pump has a auto-control switch. If the the water flow stop, the pump will stop working, if the water start to move, the pump will start to work at once. The people only need to open the water by faucets or valves, the pump will work automatically. The pump is normally in brass impeller and stainless steel motor cover. The voltage is 1-230v, 50hz. We have 90w model 15WZS10-10 and 120w model 15WZS20-15.