Plumbing · P-2GJMF

Rainwater Harvesting System Flow Diagram

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A complete rainwater harvesting and distribution layout starts with rainwater inlets on levels P4 and P3. Water feeds into an eight-inch smoothing inlet and a twenty-six thousand gallon cistern measuring twenty-one feet long by fourteen feet wide by twelve feet high, equipped with a thirty-inch manway, four-inch tank vent, and a two-inch floating filter. High and low water alarm floats maintain operational levels, while an overflow connects to a storm sump pit. Water from the cistern passes through a rainwater filtration skid, a day tank with backup domestic water connection via a reduced pressure principle backflow assembly and air gap, and a booster pump skid supplying water closets and urinals.

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