The CALCLEAR system is effective on all pipes but the optimum results are achieved on PVC or poly pipes, incurring the least interference for the sine wave signal creating the electromagnetic field. However we do not recommend using CALCLEAR with any corroded or fibro cement pipes. This is because CALCLEAR is a very efficient scale removal system and as fibro cement pipes contain asbestos particles, there is a risk of taking these back into the flow, once all the scale has been removed.
In old or very corroded pipes, bores, tanks and equipment, it is often the scale deposits that are keeping them watertight and once this is removed by the CALCLEAR system, leaks may occur. It is important to take this into account and read the warranty carefully as CALCLEAR will not accept any responsibility for leaks or any associated damage caused in this way.