- Greywater must be distributed at least:
- 18 inches from the property line;
- 2 feet from buildings;
- 50 feet from any septic tank or leach field; and
- 100 feet from wells, waterways, or other water sources.
- Greywater piping/tubing and the diverter (3-way) full-port ball valve shall be the same diameter as or larger than the clothes washer drain hose. Typically, 1-inch diameter
- The end of the main-line tubing shall be left fully open (allow a continuous unobstructed greywater route from the clothes washer to the landscape; never use a valve or plug on the distribution point furthest away from the clothes washer.)
- The greywater system shall:
- Not include a potable water connection, filters, or a pump. (Note: The pump in a clothes washer is not considered part of the greywater system.)
- Not connect to overhead (spray) irrigation. The system cannot connect to a conventional irrigation system.
- Be designed to prevent clogging of any emitters.
- Be designed and installed to prevent contact with humans and pets.
- Be labeled with, “Caution: Non-potable greywater. Do not drink”.
- Include a diverter (3-way) full-port ball valve to allow the user to direct the flow of greywater between the greywater system and the sanitary sewer/septic system. Include an auto vent (or an in-line vent or an air-admittance valve).
- The diverter valve and auto vent assembly:
- Must be installed at least 6 inches above the flood rim (typically the top) of the clothes washer.
- Must be easily accessible and labeled. Labeling shall indicate which direction to turn the diverter valve’s handle to send greywater to either the landscape or the sanitary sewer. The diversion valve must be clearly labeled and easily accessible.
- All wastewater derived from the below activities must be directed to the sanitary sewer. These activities include, but are not limited to:
- Washing diapers or similarly soiled garments
- Washing greasy or oily rags
- Cleaning car parts
- Disposal of waste solutions from photo labs
- Other activities that contain hazardous chemicals.
- Any perforations in the building created during installation are properly sealed or patched.
- Greywater systems are not suitable for lawns, small or potted plants, raised beds, pH-sensitive plants, established never irrigated plants, very low water use plants, and edible gardens.
- Have a user manual posted in close proximity to the system (see Daily Acts Greywater Handout for a printable manual).