They can be used for cleaning soft sewer blockages caused by oil, fine sand, fine gravel, drains, industrial pipes, general sewers, washing machines, wash basins, toilets, and general waste obstructions. The sewer spray nozzle connects to a 1/4 inch quick connector, enhancing water pressure for efficient cleaning. It is compatible with pressure washers up to 5000 PSI, including 4500 PSI, 4000 PSI, and 3700 PSI models. Higher PSI provides better cleaning performance for drain and sewage lines. The nozzle generates sufficient thrust to travel vertically through downspouts, such as roof gutter downspouts, though assistance may be needed to navigate bends or fittings. For optimal performance, ensure adequate water flow rate. When operating vertically, the hose does not benefit from a flooded pipe, so movement may require manual guidance. Depending on the system, push the hose down if the drain is open at the bottom, or push debris upward if connected to a storm sewer. The pressure washer jetter nozzle can be detached using the included 1/4 inch quick connector. If the existing quick release is difficult to remove, it may be glued in place. Hose nozzle size: 58 x 17mm. Not compatible with garden hoses. Quick connector size: 31mm, 1/4 inch male to 1/4 inch female, fits standard 1/4 inch quick connect nozzles. Material: Stainless steel and brass. Color: Silver and gold. Package includes: 1 x sewer nozzle, 1 x brass quick connector. No other items included. Note: Lighting and display settings may cause slight color variations between the image and the actual item. Measurement tolerance: +/- 1-3 cm.