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WISY 4" Multifunction Overflow Device

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To prevent backup in the system during heavy rains, the storage tank should always include an overflow protection device.  The WISY overflow device has a flapper valve which allows water to overflow but protects water quality in the cistern with backflow prevention and vermin protection.  The overflow device also contains an angled opening to provide skimming of small buoyant debris, such as pollen, on the water surface.

WISY Part Number: US 1002


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