EnviroPumpTM Chemical Drum Pump - Independently tested and certified to empty a drum below all recognized "empty" standards when used with the EnviroWedgeTM (order ENV55 separately). Leaves less than 2 ounces of liquid in a 55-gallon drum. Super tough PVC pump has Viton® seals. Specially designed check valve at base of pump prevents drain-back. Comes with 30" of clear vinyl discharge hose, fits 15 – 55 gallon drums with 2" NPS bung.