This pump that can be operated in both submerged and non-submerged applications. If you need to drain an area like a flooded basement or pool cover, submerge the pump. If you need to drain a water heater or fish tank, use the transfer feature. Constructed of heavy-duty, corrosion-resistant thermoplastic. The energy-efficient, water-cooled, oil-free motor is safe around fish and plants. Handles up to 1/8 in. spherical solids.