High pressure screen shower

A shower system comprising;

• a header having a fluid inlet port;
• a plurality of substantially vertically aligned spray nozzles attached consecutively to the header and arranged in a substantially arcuate formation;
• a cylinder having a first end and a second end, the cylinder having an air inlet adjacent each of the ends for introducing pressurized air into the cylinder, the header being slidably mounted upon the cylinder;
• a piston disposed within the cylinder and magnetically coupled to the header, the piston moving laterally in response to the air pressure within the cylinder;
• an elongated support member substantially parallel to the cylinder, the header slidably engaged with the elongated member;
• a control system for supplying pressurized air to each of the air inlets in an alternate fashion to effect bi-directional lateral movement of the piston;
• and
• a torque bar substantially parallel to the elongated member and the cylinder, the header being slidably engaged with the torque bar, the torque bar preventing the header from axially rotating about the elongated member in response to a thrust produced by liquid jets that emanate from the plurality of nozzles.