Grey Water Treatment

Grey Water Treatment

Grey water — drainage from sinks, showers, laundry, and HVAC condensate — accounts for 50 to 80% of a building's wastewater volume. Treated and reused for toilet flushing and irrigation, it reduces potable water demand by 30% or more in commercial buildings. California, Texas, and most western states now have grey water reuse frameworks that allow treated grey water for specific non-potable uses when the treatment system meets NSF/ANSI 350 Class R standards.

AMPAC USA designs compact grey water treatment systems for hotels, resorts, apartment complexes, and industrial facilities. A typical system processes laundry and sink drain water through coarse screening, biological treatment or advanced filtration, UV disinfection, and a storage cistern with automatic makeup from the potable supply when grey water volume is insufficient. The treated output meets or exceeds requirements for toilet flushing, urinal flushing, and drip irrigation.

System capacity is sized to the building's actual grey water generation rate, which varies significantly between a hotel's laundry-heavy load and an office building's primarily sink-drainage flow. Each installation includes automated controls, water level monitoring, and an alarm system to prevent cross-connection with potable lines — a critical compliance requirement in all jurisdictions.

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