This Elemental Solutions® H2O Pump features waterproof motor casing, a durable ceramic shaft, corrosion-resistant housing and an adjustable flow rate. The submersible 9.5-watt H2O Pump has a multi-step 1/2-inch and 3/4-inch barbed fitting, and it pushes 171 gallons per hour with a maximum head of 4.75 feet.