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The PURAIN Rainwater filter, also known as the hydraulic jump filter, is the innovation for roof areas ranging from 60m² to more than 15.000m².
This hydraulic jump technology cleans itself automatically. 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. The water flow is substantially changed by the height drop, from a sub-critical to a super- critical flow. At the bottom of the dip, the waterflow changes again to a subcritical flow in a process now commonly known as hydraulic jump. This resulting increase in water power is similar to a strong eddy and any impurities are then forced over the next level and washed away downstream. Finally a filter that is low maintenance and self-cleaning!
Click here for more information on our Rain Water Harvesting systems.
PURAIN filter DN100 with skimmer and non-return valve
The PURAIN Rainwater filter, also known as ..
PURAIN filter DN100 with skimmer
The PURAIN Rainwater filter, also known as the hydraulic jump fi..
The PURAIN Rainwater filter, also known as the hydraulic jump filter, is the innovation for roof are..