Generally the harvested rainwater before entering the tanks should be filtered finely. (Mesh size < 0.5 mm). By removing from organic substance of all kinds, which are along-rinsed by the roof and from the gutter, the quality and the shelf-life of the stored water are strongly improved. High-quality filters enrich the tank water besides with air and thus with oxygen on an important criterion for good water quality.
Requirements of good filter systems are:
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Filtering before the tank
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Reliable removing from large and small particles from the water of expiration of roof
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Permanently high water yield
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Air enrichment of the filtered water
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Low maintenance need by large self cleaning of the filters
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No germs, no fungal, no algae by draining after rain events
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No cross-section contraction of the building drainage after DIN/EN
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Good accesibility, simple cleaning, shut-off barness of the memory inlet
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Longevity, no subsequent costs.
In the rainwater storage tank a filter should secure for the swimming intakes of the pump to their protection from particles. Depending upon need here coarse or fine filter can be used. Without further fine filters after the tank should be in principle done both to sucking and printinglaterally the pump, since these are unnecessary. Particularly fabric and cartridge filters often close up with bio film and often shorten by flow resistances the life span of the pump. Besides filter cartridges with bio films, can later worsen often the water quality. Source: UBS |
