The Enz-Bulldozer has a hydrostatic chamber, herewith reducing water turbulences and improving the flow dynamic to the ceramic inserts. The result is a compact, aggressive and most effective water jet not attained up to now. A forward jet, on all Enz-Bulldozer, clears the debris ahead of the advancing unit. If desired, the front-jet can be closed by a blind plug. Two additional nozzles, set slightly higher, clean the sides of the channel.