for connectable roof areas up to 9,000 m².

The 3P filter column is used to clean rainwater from roof surfaces and then collect it in a cistern, allow it to seep away or discharge it into a receiving watercourse. The filter column arranged in the middle of a prefabricated concrete shaft is equipped with a stainless steel screen mesh. With a mesh size of 0.39 x 0.98 mm, particulate pollutants can be safely removed from the rainwater. The rainwater is thus purified and available for further use.
The dimensions of the inlet and outlet connections as well as the sieve surface are dimensioned according to the size of the connected area.

Advantages:

• Connectable roof areas up to 9,000 m²
• Max. flow rate up to 270 l/s
• High filtration and high retention of contaminants
• Compact system with high operational reliability

Function:
The rainwater entering the concrete shaft is dammed up to the base height of the filter wall. It then flows evenly through the rectangular filter surface from one side to the other. The cleaned rainwater flows out via the drain on the opposite side. The volume between the base of the column wall and the concrete wall of the surrounding shaft serves as a sludge and sand trap.