Waterco 16V1275 UltraVac Dual Stage with Cyclonic Filtration Vacuum 1HP 110V Pump - The Waterco UltraVac Vacuum Cart comes complete with a 75SqFt. cartridge element and a 1HP pump, suitable for cleaning any size pool. This is a dual stage model that features cyclonic powered filtration. The two different modes available for this vacuum are filtration mode and waste mode. By recirculating the water through the cartridge you can remove debris being vacuumed out of the pool without losing water. For removal of large amounts of debris or to avoid clogging the cartridge you can rotate the valve handle to bypass the filter and discharge the water directly to waste and not return to the pool.