PURAIN
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INTEWA PRODUCTS rainwater harvesting filter for tank installation with unique efficiency – self-cleaning, patented. PURAIN NIARUP WATER, WE‘RE IN OUR ELEMENT TNEMELE RUO NI ER‘EW ,RETAW

We have designed the PURAIN Rainwater filter, sometimes known as the hydraulic jump filter, for roof areas ranging from 60m² to more than 6000m². This filter automatically cleans itself by means of the hydraulic jump. The design model for PURAIN Rainwater filters comes from nature. At almost every course in a stream, you can see how the hydraulic jump functions. The water flows over one of the stones, smooth and rounded by the action of the water over time. At the bottom of the dip, the waterflow changes to a subcritical flow in a process now commonly known as hydraulic jump. This resulting...

TECHNOLOGY Sample installations: To follow are a few examples of the PURAIN rainwater filter integrated into various tanks: PURAIN rainwater harvesting filter PR100 for single family dwelling in plastic tank PURAIN rainwater harvesting filter PR150 for industrial, public or commercial buildings in concrete tank In 2001, the self-cleaning PURAIN rainwater filter patented by INTEWA was launched. Since that time, more than 20,000 units have been installed. The PURAIN Rainwater filter, originally named the hydraulic jump filter, on the basis of its cleaning principle, is now well known all...