Hydro jetting is a technique used by professional plumbers and drain cleaning specialists primarily to clear tough blockages in sewer and drain pipes. A flexible hose is inserted into the clogged drain and a stream of water (or jet) at high pressure flows out a nozzle at the tip of the hose, removing stubborn clogs, scale and grease build-up. Hydro jetting uses pressures of 3000psi up to around 5000psi and variable amounts of water flow to safely and effectively flush out any debris from the pipes.