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Pencil jets enable the power available to be concentrated in a very small area they have a very aggressive effect. Fan jets produce a spray rather than a jet and are less aggressive. |
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The general principle of Drain Sewer and Pipework cleaning with water jets is as follows. A set of rearward facing jets will push out water and propel the hose and jetting head to the desired position along the drain. The cleaning and removal of the debris is then carried out by pulling the hose and head back towards the operator while keeping the water pressure fully on. The rear facing nozzles are now being used to provide a flow of water to flush out the debris in the drain. |
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If there is a blockage in the drain or sewer then a forward facing jet - usually of the straight or pencil type can be added to the jetting head. This forward facing jet will cut its way through the blockage and the rear facing jets will then break up and disperse the blockage. The debris can then be removed by pulling the entire hose and head rearwards towards the operator. |
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It may be necessary to feed the jet slowly through a blockage or past a bad joint in a pipe using the steps shown below. |
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Put a loop in the flexible
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Hold the loop in the hose
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Crank or rotate the loop several times back and forth through a right angle.
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The nozzle will rotate inside the pipe and provide effective removal of the debris from the inside of the pipe wall.
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