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Compact design for simple installation in round vertical rainwater downpipes
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full cross-section of downpipe maintained
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more than 90% of rainwater collected
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low maintenance
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high quality units with a proven track record for reliability and efficiency
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manufactured by WISY
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corrosion and frost proof
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available in various sizes to suit most round pipes
These filter collectors are designed for simple and easy installation in rainwater downpipes. The unit is installed by removing a section of downpipe.With no obstruction or narrowing of the downpipe, the unique construction (WISY Patent No 3812136) maintains full flow of water through the downpipe and filter.
This is particularly important in hailstorms and torrential rainfall. Even in such demanding weather conditions, the unit will harvest 50% or more of the rainwater flowing through the conventional manner to surface water drain or soakaway.
Water is drawn through the vertically orientated stainless steel filter insert by adhesion forces. Filtered water falls into the collection channel and is fed via the outlet connection to the storage tank. Remaining water washes debris and particles larger than 0.44 mm through the filter collector into the drain or soakaway in the normal manner. In order to maintain efficiency the filter insert requires regular cleaning at 2 to 3-monthly intervals.
Materials that do not retain water are best for rain harvesting. Slate, clay or concrete tiles are most suitable. Coated
metal or composite fibre sheets are also good. Planted ‘green’ roofs are less suitable due to the discolouration of the water. Unsealed asbestos cement roofs are not recommended as the fibres tend to block the filters more frequently.
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