The sludge pump connects directly to your pressure washer gun/lance, using the washer’s flow to create a strong Venturi-driven suction. Depending on your machine’s pressure, water flow, and the material being removed, it can draw between 35-80 liters per hour — approximately 35 to 79 gallons per minute (GPM). With this level of suction, it can efficiently clear mud, sludge, sand, debris, and stones up to 7/8" in diameter. It’s also ideal for general water transfer applications such as draining swimming pools, removing floodwater, cleaning out septic or sewage pits, and other similar tasks. 1.5" diameter hose 16' long hose Quick disconnect plug Max Pressure: 4000 PSI Max Temp: 60°C / 140°F Inlet Fitting – M22 Male + 1/4" QC Plug Nozzle Orifice: 5.5 Drain Hose Options – 5, 10, 15