They could be used for cleaning the soft sewer blocked of oil blocks, fine sand, fine gravel blocks, drain cleaning, industrial pipe, general sewer, washing machine, wash basin, toilet, and general waste obstruction etc.The sewer spray nozzle could be connected to a 1/4 quick connector, make the water more powerful, easy to match and install. your drain pipe blockage problem easily. You could remove the pressure washer Jetter nozzle from the jetter by using 1/4 quick connect matched in our package.You could adjust the pressure to use it in the French drain corrugated plastic tubing safely. It could used in 5000 PSI/ 4500 PSI/4000 PSI / 3700 PSI pressure washer.The higher your power washer psi the better results you'll get out of cleaning your drain and sewage lines. It could generate enough thrust to go vertically up a downspout.Assume you refer to a roof gutter down spout. It would "climb" the down spout though you may have to either remove the angled fitting at the base or assist the movement of the jetter hose around the inner edge of the bottom fitting. Ensure that the water supply flow rate is at the required level. Since the nozzle and hose would be working vertically, you would not have the Advantage of a flooded "pipe" that usually eases the movement of the hose along the pipe.Gravity will force all liquids and solids to fall to the ground. If drain pipes are open at bottom, then push down. If pipes are connected to storm sewer then push debris up. You could remove the old quick release by wrenches. If failed, it means your quick release is glued.Hose Nozzle Size: 58 x 17mm,Not work with garden hose.Quick Connector Size: 31mm, 1/4 inch quick connect to 1/4 inch female, fits 1/4 inch quick connect nozzles.Material: Stainless Steel + Brasscolour: Silver + GoldPackage Contents:1x sewer nozzle1 x Brass Quick ConnectorOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.