CHIMNEY SWEEP

 I use Rodtech equipment which uses different size protective strands which spin at a speed which I control.When power sweeping the brush head through centrifugal force expands to suite the flue you are sweeping it also centres itself,  Because it is not a traditional brush there is no surface tension being created in the sweeping process as the head adjusts to fit the flue. You adjust the force of the sweeping action by increasing the speed of the drill this has the effect of stiffening the brushing action. So if you are doing an older style chimney then you would use a low speed however if you are doing a heavily built up clay / steel flue then you can up the speed giving you an unbelievable cleaning action. Also the action of sweeping clockwise positions the head to the right hand side when sweeping a larger type chimney likewise reverse the drill and you then sweep the left side. In short you clean chimneys more effectively causing less strain on the structure of the flue.