Features In Sump Operation. Plug-in and Go Venturi Driven Spiral Air-Water Movement Inside Skimmer Pump Included Counter-Current Design Promotes Maximum Air-Water Contact Time Fixed Output (MPS 75 and MPS 150) Effluent Drain Hose Included Removable Collection Cup With Fittings fro Remote Drain-Off Air Injection Valve Easy to Install With Complete Instructions Lifetime Warranty Against Defects in materials and Workmanship Dimensions 22 in x 3 in Rio 800 Pump Included