PURAIN HD Series 6″ to 16″ Pre-Filters – In Ground
If you are looking for a self cleaningfilter with maximum capture efficiency, the PURAIN Jump Filter is for you. The key to the design of Intewa’s PURAIN filters is the hydraulic jump. Up to a certain rainfall rate, rainwater capture is 100%, something no other self cleaning filter can claim. The point at which hydraulic jump occurs accounts for around 97% of all rainfall in most regions, so actual total filter efficiency is over 98% over the course of a year.
When hydraulic jump occurs, the filter screen is naturally and vigorously cleaned. This happens 4-10 times a year in most regions.
The hydraulic jump simulates what happens in a stream when water flows over a drop caused by stones.More…
Here are the key features of the PURAIN filters: