These “rim guns” are specially designed for clearing clogged drains by means of a compressed air “shot” which suddenly strikes the water on top of the clogged part inside the pipe or drain. The result of this “air shot” is a wave of kinetic energy striking the resistance point vertically with high pressure and clearing the waste and clogged parts away. (Remarks: The pressure against the side walls of the pipe is only a small percentage, avoiding any damage.) Effective Range: The clearing effect depends on the pipe diameter and the distance between the clogged part and the pipe entrance. Model H: Designed for multi-purpose use. (To be used for condenser tubes, pipes, toilets, etc.) By using the hand pump, an air pressure of 10 kgf/cm2 can be built up. In addition to this, a valve has been fitted to a kinetic rim gun enabling the fitting of this model to an air compressor. Note: Spare parts are available on request.