is Self priming smoothly, easy connecting system, powerful automatic pressure pump, extremely efficient, very low current draw and offer high capacity output Self Priming is Built-in pressure switch automatically turns the pump off when pressure builds up such as turning off the tap and it will automatically turn back on when you turn the tap back on Diaphragm Pump is ABS solid construction body, soft rubber mounting, stable and heavy duty equipment. Easy to dissipate heat with two big holes on one end of the pump body High Pressure is An indicating arrow on the pump to direct the water flow, and it directs to the outlet water side Diaphragm Self Priming have Wide applications, such as for car washing machine, the solar energy water, remote control water equipment, some place need to control the switch frequently, somewhere energy saving, etc, Weight: 2.5573622392 pounds, Manufacturer: Qiilu