GreyFlow™ Technology

How GreyFlow works

GreyFlow™ is a purpose-built greywater diversion and reuse platform that captures household greywater (laundry, showers, basins—not kitchen), filters it, and pumps it to sub-surface irrigation—keeping water in the landscape while protecting public health and avoiding surface pooling. The core architecture is a compact, underground pit with a float-controlled pump and dual filtration path, feeding approved dripline below mulch/soil. 

Two filtration configurations

Systems ship in two configurations: (1) manual clean filters, and (2) automatic self-cleaning filters (with a controller and blower for filter backflush). Both share the same field-proven pump-pit and float logic—the automatic variant reduces routine maintenance in higher-use or low-access sites. 

Smart pumping & duty control

Float switches manage standby, operate, and (on self-cleaning variants) timed backflush modes to keep flows stable. Pump sizing options cover common head/flow envelopes for residential reuse (e.g., 100 W / 300 W / 400 W classes); sub-surface irrigation with GreyFlow-approved dripline is required. 

Designed for compliance & safety

Discharge must remain under mulch or soil; PVC works must be installed by a licensed plumber, and a dedicated power supply is required—aligning installs with local rules and AS/NZS practices. Kitchen water is excluded by design (grease/food solids), but can be introduced after primary filtration through a grease trap. 

Note: For larger new builds, GreyFlow™ PS provides a 2-stage “Builder’s Kit + Finishing Kit” pathway that integrates neatly at pre-lay, then completes post-construction with filters/pump and irrigation.

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