The Walrus HQ-400 220V is a complete all-in-one unit consisting Pump Motor, Pressure Tank, Electronic controller. 9GPM ,1/2HP,1" NPT Female. Stainless steel body, built-in check valve. The built-in electronic controller provides constant pressure which ensures that the pump starts automatically when water is consumed and operates continuously until water is not required. Compact design and quiet operation make the Walrus pump suitable for almost all applications. Constructed from top quality corrosion resistant materials. The Walrus has an automatic restart function. When the liquid temperature is over 131 F, the overload relay will trip and automatically stop the pump. Restarting will be attempted when the liquid temperature drops to 104 F. The motor has built-in thermal overload. The Walrus has an anti-cycling feature which prevents the pump from continuous starting and stopping when you have a dripping tap or minor leak in the system. The Walrus will lift water up to 25 ft. with foot valve and pump suction piping filled with water.