Graf Optimax Filter External
Freeflush
£549
Price read from Freeflush on 2026-10-15. Check before buying.
For the majority of SuDS and rainwater harvesting applications pre filtration is required to remove silt and organic matter from the system to prevent blockage and poor performance. Features and Benefits: External filter to clean the rainwater before the tank Available for pedestrian loading and for vehicle loading Provides over 95 % water yield Low maintenance as it is self cleaning Continuously variable installation depth of 580 - 1,050 mm (22.8 - 41.3") using the telescopic dome shaft Minimal height offset (200 mm) between the inlet and outlet Maximum roof surface area of 350 m² with connec
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