Model J-2900B General's Jet Sets are ideal for clearing soft stoppages such as grease, sludge, sand and ice from the drain. Use 3/8" ID hose for clean outs, 4" through 8" floor drains and septic lines at distances up to 90 meters. With 1/4" ID hose, you can clear 2" through 4" lines up to 60 meters away. And 1/8" hose has the flexibility to get through 1-1/2"~2" lines and bends up to 22 meters down the line. It uses a stream of high pressure water that hits the stoppage and flushes it away. The thrust of the nozzle drives the hose down the line and gives you wall to wall pipe cleaning action. J-2900B is powered by an 11HP motor. It generates 3000 psi at 4 gallons per minute. The vibra-pulse system lets you work the hose around tight bends and small lines, while keeping the flow rate the same whether vibra-pulse is on or off. All nozzles are made of plated hardened steel to last longer.