INTEWA PURAIN Filters Video

Unlike other self-cleaning filters the INTEWA PURAIN filter allows the filtration of light rainfall of with 100% efficient collection. As 97% of annual rainfall is mainly light rain, the overall efficiency is 98%. Heavy rainfall that contributes approximately 3% to the water yield, activates the self cleaning function and the high energy from the resulting hydraulic jump is the optimal and natural way to rinse and clean the filters. With optimal efficiency and low maintenance costs, this unique, patented, hydraulic jump filter is best demonstrated by nature and you can