For roof areas to 500 m2. High level of filtering efficiency, independent of flow rate. Continuous filtering of dirt particles. Frost resistant, low maintenance. Filter insert is easily removed for cleaning. Materials: PE with Stainless Steel sieve with a mesh size of 0.55 mm.

1. As water arrives the level builds up and is equally distributed across the cascade
2. Pre cleaning through the cascades. Largest dirt particles are led across the primary filter cascades directly to the sewer.
3. Pre filtered water then flows over the secondary filter sieve (mesh size 0.55 mm). Due to the special mesh structure of the sieve, any dirt washes directly into the sewer which means the filter is self cleaning, with very low maintenance.
4. Cleaned water flows to the cistern.
5. Dirt goes to the sewer.