Graywater Reuse Systems:
Sustainable Water Solutions for Your Business

A graywater reuse system collects gently used water from select sources within a building and treats it for reuse. A typical GRAYWORKS process includes:

1. Collection: Water from approved sources is diverted through separate plumbing and routed to the graywater collection vessel and/or treatment system.
2. Pre-Filter Screening: Lint and hair are removed by a self-cleaning pre-filter screen, which automatically flushes debris to the sewer. The screen may be mounted locally or paired with a remote pump station.
3. Biological Treatment: Microorganisms on patented surface-active media, in an aerobic environment biologically degrade pollutants, providing stable treatment across varying flow and water quality conditions.
4. Filtration: A multi-stage filtration process removes remaining suspended solids by using fully automated backwashing media that discharges captured solids to the sanitary sewer without operator intervention.
5. Ultraviolet (UV) Disinfection: UV disinfection delivers a controlled UV dose to effectively inactivate bacteria, viruses, and other microorganisms without addition of chemicals. UV intensity and system performance are continuously monitored to ensure compliance with reuse standards.
6. Optional Chlorine + Dye: Chlorine and dye dosing systems can be included as required. Dosing pumps, chemical storage, and spill containment are fully integrated within a dedicated cabinet.
7. Treated Water Storage: Treated graywater is stored in a dedicated storage tank, where it is maintained in a ready-to-use condition. This design ensures consistent water quality and immediate availability for approved reuse applications. A packaged booster pump system delivers the stored water on demand to designated end uses.

This treatment train is designed to be effective, reliable, and facility-friendly—supporting day-to-day building operations with minimal disruption.

Developed alongside Critical Flow, the GRAYWORKS product line has helped establish the viability of decentralized graywater treatment and reuse and rainwater harvesting through industry-leading biological treatment and a modular, scalable design.
GRAYWORKS supports a wide range of commercial and institutional uses, including:

• Resorts and hotels
• University dorms and campuses
• Corporate campuses and offices
• Multi-unit residential and mixed-use developments

 For our clients, GRAYWORKS helps reduce water use and operating costs while keeping systems practical for facilities staff.

RMS can also provide custom graywater reuse systems for commercial and industrial applications. The core treatment approach remains consistent, while system configuration can be tailored to meet site-specific needs. Modular housing can be included or omitted depending on available space.

RMS also offers a Value Package graywater reuse system designed for subsurface irrigation. Because subsurface irrigation eliminates human contact, treatment requirements may be less intensive—often reducing total project cost (application and regulatory requirements vary).

Graywater reuse delivers both environmental and financial value:

• Water Conservation: Reduce potable water demand by reusing water that would otherwise be discharged.
• Cost Savings: Lower water and sewer bills—especially impactful for high-use facilities.
• Reduced Environmental Impact: Decrease pressure on local water supplies and reduce energy tied to water treatment and distribution.
• Supports Sustainability Goals: Helps meet ESG, LEED, and internal conservation targets while enhancing public perception.