Underhill DN-75 Drain Blaster Cleaning Nozzle, 3/4-Inch Hose Thread Special feature includes wire attach connector for using wire locator to determine draining route Great for cleaning under sidewalks or cart paths; Use minimum water pressure of 70 psi for best performance Front jets cut through blockage; Rear jets propel nozzle up line High pressure nozzle has a two stage flushing action that guides itself and cleans out debris with ease Made of heat treated grade 303 stainless steel for long life