Commercial Scale Greywater Systems

Commercial Scale Greywater Systems Apartments, businesses, schools, and other situations with more water, more people, and more public exposure to the greywater will require a more complex and sophisticated system for reuse. These systems typically collect greywater in a large temporary tank, filter and disinfect it, and then pump it back to either flush toilets, or supply a […]

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Laundry-to-landscape in Interior-walled Laundry Room

Laundry-to-landscape (L2L) System in Interior-walled Laundry Room The difference in a system from a washing machine located in a room with interior walls, as opposed to one with an exterior wall, it that the greywater pipe typically exits through the floor. This laundry room has a crawlspace underneath, so the greywater pipe can exit through the floor, […]

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Need a greywater installer

Need a Greywater Installer? If you can’t find a trained greywater installer in your town it is still possible to get quality professional assistance, though you’ll need to do some preparation work. Here’s the process we recommend: First, educate yourself about different types of greywater systems, their maintenance requirements, and if they’ll meet your irrigation […]

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Residential Greywater System Study

Residential Greywater System Study We have completed the report on the results of our study on residential greywater systems in Central California. (Download links below.) We studied 83 systems in the San Francisco Bay area, Monterrey Bay area, and the Santa Rosa area. We conducted interviews, collected and tested greywater and soil samples (analyzed at a […]

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California Regulations

California Greywater Regulations California’s greywater code is found in Chapter 16 of the California Plumbing Code (CPC). Under the current code washing machine systems can be constructed without a permit in single family homes (1 or 2 units), so long as 12 guidelines are followed (see below). Other types of systems require a permit in […]

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Arizona Regulations

Arizona Greywater Regulations Arizona uses tiered permitting. Download a pamphlet from AZDEQ with simple explanations of the regulations and if your system requires a permit or not. Tier 1 (less than 400 gallons per day) does not require a permit under certain conditions (see below). R18-9-711. Type 1 Reclaimed Water General Permit for Gray Water […]

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New Mexico Regulation

New Mexico Regulations The state of New Mexico does not require a permit for private residential greywater systems that follow the following guidelines. This was copied from the state site on on 9/1/09. Download a brochure from NM Env. Department on the rule here.  20.7.3.810 GRAYWATER DISCHARGES: Graywater discharge of less than 250 gallons per day […]

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Greywater Resources

1. Presentations and Webinars View the recordings and download the pdfs of Greywater Action’s past webinars here. Greywater 101 Plumbing 101 for Greywater Installers Design and Install Your Own Laundry-to-Landscape System Gravity-Flow, Branched Drain Systems and Greywater Irrigation in Arid Climates Southern CA Fruit Trees 101- How to Irrigate Your Home Orchard with Greywater Installing […]

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Rainwater Harvesting Resources

Rainwater Harvesting Resources   1. Presentations (pdf) Big Blue Bucket presentation from SFPUC on rainwater harvesting and low-impact design in San Francisco. Rainwater Harvesting Training Presentation  by the Texas Water Development Board, 2. Video This artistic “rainwater collecting tree”, created by Christina Bertea, transforms into a clothes line. Read more and see the video here. […]

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Composting Toilet Resources

Composting Toilet Resources 1. Presentations (pdf) An Introduction to Eco Toilets from the Green Center. Ecological Sanitation- an Overview. By Professor Dr. Petter D. Jenssen, The Norwegian University of Life Sciences Composting Toilets in Large Buildings by 2020 Engineering. 2. Video Video about the Bronx Zoo’s sewerless bathroom (composting toilets and greywater systems). Watch here. Page of videos on the […]

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