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All toilets and most showerheads today meet the federal water-efficiency standards, but not all of these products perform satisfactorily. With toilets and showerheads, we include products that meet or exceed WaterSense standards, which includes performance requirements—although we go beyond WaterSense where there are issues not adequately addressed by the program. We also look for other products that conserve potable water, such as rainwater catchment and graywater recovery and reuse systems.

All toilets and most showerheads today meet the federal water-efficiency standards, but not all of these products perform satisfactorily. With toilets and showerheads, we include products that meet or exceed WaterSense standards, which includes performance requirements—although we go beyond WaterSense where there are issues not adequately addressed by the program. We also look for other products that conserve potable water, such as rainwater catchment and graywater recovery and reuse systems.

  • Wahaso Graywater Harvesting
  • Wahaso Graywater Harvesting
  • Wahaso
  • Wahaso Graywater Harvesting
    Wahaso
    Wahaso offers a commercial-grade graywater harvesting system, which includes pumps, storage, filtration, and controls that are custom-designed by the company. The systems consists of a two-stage filtration for particulates, sanitation with chlorine or UV light, a repressurization system of two commercial-grade pumps, and automated controls and reporting that are compatible with building automation systems running BACnet. Wahaso's systems are pre-built on skids and delivered ready for installation. Four models are available for capacities from 7,200 gallons per day to 36,000 gallons per day. The system is pending NSF-350 certification.
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  • Aquatron and Dubbletten Toilet Systems
  • Aquatron and Dubbletten Toilet Systems
  • Rosie's Natural Way
  • Aquatron and Dubbletten Toilet Systems
    Rosie's Natural Way
    Rosie’s Natural Way distributes a urine diverting system, called the Dubbletten, and a composting system, called the Aquatron. The Dubbletten is a low-flow toilet with a split bowl that keeps urine separate from fecal waste from the outset; solids go in the back and liquids in the front. A 1.0 gallon flush is used for the back, and an optional “spritz” (0.01 gallons) is provided for the urinal. The urinal has an elastomeric membrane without a trap, but urine goes directly to a storage tank, where it is sealed by an oil solution. Buildings can then use the urine as a nitrogen-rich fertilizer.

    The Aquatron attaches to the back bowl of the Dubbletten or to a conventional toilet to retrofit it into a composting toilet. The system can be installed up to 196 ft (60m) away because a non-mechanical separator installed an angle below the toilet uses centrifugal force to separate 98% of liquids and flush water from solid waste. Solid waste is diverted to a biological chamber where it decomposes into compost. Liquid waste can then be directed through a UV-filter and phosphorous trap, producing water suitable for irrigation. Aquatron systems range in size from 13 gallons (50 liters) for second homes to 3,170 gallons (12,000 liters), designed for use with 10–12 toilets.
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  • Nexus eWater System
  • Nexus eWater System
  • Nexus eWater
  • Nexus eWater System
    Nexus eWater
    The Nexus eWater system converts a home’s graywater into near-potable water and utilizes waste heat in the water for more hot water heating. The system directs graywater to a collector that has an embedded heat exchanger, which uses refrigeration coils to transfer the heat to the Nexus reHeater. The 70-gallon hot water heater uses 15 kWh per day to heat water to 120°F and has a COP of 4.0. Once the heat is extracted, graywater is pumped through the Nexus reCycler, filtering the water to standards required by NSF-350 at a capacity of 200 gallons of per day. Bubbles are circulated to adhere to soap, dirt, and oils, eventually hardening into a foam that is returned to the sewer. After passing through a UV and carbon filter, the water is near potable and can be used for irrigation or for toilets (code allowing). The system recovers more than 90% of graywater for reuse but requires separate black and graywater plumbing.
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  • Zurn Omni-Flow Urinal
  • Zurn Omni-Flow Urinal
  • Zurn Plumbing Products Group
  • Zurn Omni-Flow Urinal
    Zurn Plumbing Products Group
    The Zurn’s Z5755 Omni Flow Urinal provides the unique feature of accommodating multiple flow rates from 0.125 gpf to 1.0 gpf. This allows plumbers to install multiple low-flow urinals and set one or two to high flow to help move water down the line, preventing uric salt build-up and pipe corrosion. The urinal comes in a standard size for retrofitting and the flush valve has a 10-year life on the battery. Its asymmetric back wall minimizes splash-back.
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  • Steward Hybrid High-Efficiency Urinal
  • Steward Hybrid High-Efficiency Urinal
  • Kohler Co.
  • Steward Hybrid High-Efficiency Urinal
    Kohler Co.
    The Steward Hybrid urinal has the same appearance as Kohler's Steward Waterless model, but flushes with 0.125 gpf. This makes it ideal for installing along with the waterless models in order to provide a flush that will help clear the pipes down the entire line. This wall-hung, vitreous china urinal has a large footprint that can cover an old urinal wall print, making it an easy retrofit. A 15 5/8" extended rim and 3/4" top spud allows for ADA installation. The funnel bowl shape minimizes splash-back and a "flushing spreader," located on the back wall is designed to clean the entire bowl. The urinal is WaterSense compliant when used with WaterSense flushometer.
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  • Resno Waterless Urinal
  • Resno Waterless Urinal
  • Enman Corporation
  • Resno Waterless Urinal
    Enman Corporation
    The Resno is a waterless urinal for residential applications that is concealed in a wall and has a tip-out door that can close when not in use. A "biological puck" sold by the manufacturer is placed in the retainer to remove odors and prevent build-up in the sewer pipes, using bacteria to dissolve naturally occurring salts. The puck lasts 1 to 2 months and may have to be periodically rotated to ensure it evenly dissolves. Made of ABS plastic, the urinal is designed for installation into any 2x4 wall.
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  • The Chilipepper Appliance
  • The Chilipepper Appliance
  • Chilipepper Systems
  • The Chilipepper Appliance
    Chilipepper Systems
    The Chilipepper Appliance is an on-demand water circulation device that speeds the availability of hot water at the tap. This energy- and money-saving appliance is easily mounted at the most remote tap. The 115-volt pump moves cold water out of the hot-water line and back to the water heater via the cold-water line. The Chilipepper is activated by either a wireless remote or a wired controller.
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  • Full Circle Composting Toilets
  • Full Circle Composting Toilets
  • Full Circle Composting Toilets
  • Full Circle Composting Toilets
    Full Circle Composting Toilets
    Full Circle offers a waterless composting toilet with modular, interchangeable composting containers. The bathroom commode, available in wood, porcelain, or plastic, uses wood shavings for a "dry flush" and a 4-watt ventilation fan to manage odor. A single commode connects via a sealed plastic chute to a roll-off container the size of a garbage pail stored below in a basement or crawl space. When a container is filled, it is disconnected, capped, and set aside to compost. A new container is wheeled into place and connected to the chute. Both active and resting containers are sealed and connected with the exhaust, and the air-handling system draws air through up through the entire compost bin, supplying oxygen to all corners of the container for complete composting. Containers with completed compost can be wheeled outside and emptied onto landscaping. Maintenance takes 15–30 minutes and happens every six months to a year, according to the company. An electronic light indicates when it is time to swap compost bins. A divided, urine diverting bowl is available, to direct urine into a dedicated drain for storage, treatment, and reuse as fertilizer.
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  • E-Treat Water Conditioner
  • E-Treat Water Conditioner
  • Sierra Water Solutions
  • E-Treat Water Conditioner
    Sierra Water Solutions
    The E-Treat water conditioner, distributed by Sierra Solutions, is a whole-house scale-preventing water treatment using template-assisted crystallization (TAC). Water passes through a two-chamber tank containing activated carbon and anti-scale media, which attracts and crystallizes calcium and bicarbonate ions and prevents them from accumulating as scale on the plumbing. The system can handle 12 gpm of water with a maximum hardness of 7 grains. E-Treat requires no electricity, salt, or backwashing.
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  • Griswold Water Systems
  • Griswold Water Systems
  • Griswold Water Systems
  • Griswold Water Systems
    Griswold Water Systems
    Griswold Water Systems offers a variety of nonchemical water treatment products, including the Wave water filter for cooling towers. The Wave filters water through induced electrical zones to create “seed crystals”—forcing impurities to crystallize and precipitate instead of forming scale or biological material. The Wave system can fit pipes from 1"–24" in diameter, operate between 14ºF–120ºF, and handle variable voltage between 85V–264V (AC). The system draws less than 150 watts.
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  • Solar Aquatics
  • Solar Aquatics
  • ECO-TEK Ecological Technologies Inc
  • Solar Aquatics
    ECO-TEK Ecological Technologies Inc
    Ecological Technologies (ECO-TEK) produces Solar Aquatics community-scale wastewater treatment systems, primarily in Western Canada, that rely on ecological systems for water purification. No chemicals are used in the process—instead, the water runs through a diverse mix of plants, animals, and medium supporting bacteria in greenhouse tanks. Ammonia in the water is oxidized into nitrate, which is taken up by algae and other plants; solids have to be periodically removed and aerobically processed. Polishing is performed with sand beds and constructed wetlands, followed by ultrafiltration and UV sterilization. The process takes 2–3 days, after which the water is suitable for nonpotable applications or aquifer recharge.
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  • Crosley Clothes Washers
  • Crosley Clothes Washers
  • Crosley
  • Crosley Clothes Washers
    Crosley
    Crosley offers three washers—two front-load and one top-load—meeting GreenSpec criteria. The washers, with capacities of 3.3–3.9 cubic feet, have MEF ratings of 2.48–3.09, WF ratings of 3.3–3.64, and estimated annual electricity use of 83–123 kWh.
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  • Cutting Edge Grass Seed
  • Cutting Edge Grass Seed
  • Cutting Edge
  • Cutting Edge Grass Seed
    Cutting Edge
    Cutting Edge grass seed is a blend of non-genetically-modified Kentucky blue grass and fescue varieties that create a root system capable of growing 48 inches deep—reaching areas where water is more likely to be found in drought conditions. The company uses an organic seed coating that provides hydration and contains endophytes, a naturally occurring fungus that repels insects, and rhizomes that encourage root growth. The combination of slow growth and drought-, insect-, and disease-resistance significantly reduces maintenance, according to the company. Cutting Edge grass seed is for use in cool season and transitional zones. Note that because the company will not divulge its proprietary cultivars, Cutting Edge is not available in states that require full disclosure of grass varieties.
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  • BioBarrier Membrane Bioreactor System
  • BioBarrier Membrane Bioreactor System
  • Bio-Microbics, Inc.
  • BioBarrier Membrane Bioreactor System
    Bio-Microbics, Inc.
    BioBarrier is a decentralized wastewater treatment system that can process combined household wastewater, including blackwater, into non-potable water clean enough to be reused onsite, even indoors, as part of a graywater reuse system. BioBarrier was the first system to meet the ANSI/NSF Standard 350 for Onsite Residential and Commercial Water Reuse Treatment Systems. BioBarrier consists of a two-compartment septic tank, a membrane bioreactor (MBR), MBR cartridge, a blower, a pump, and controls. The BioBarrier MBR system is certified NSF 350 for its units treating 500, 1,000, and 1,500 gallons per day (gpd). The company offers HSMBR (High-Strength MBR) systems for commercial buildings and small communities that can treat up to 9,000 gpd. Note these units require both blowers and pumps, so energy consumption has to be weighed against the benefits of water reuse and treatment.
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  • OneFlow Scale Solution
  • OneFlow Scale Solution
  • OneFlow
  • OneFlow Scale Solution
    OneFlow
    OneFlow distributes the next-ScaleStop, from Next Filtration, under the brand name OneFlow for commercial applications. OneFlow is a scale-preventing water treatment that uses template-assisted crystallization (TAC) to effectively prevent scale without an electric draw or ion replacement. The OneFlow process media, which should be replaced every three years, consists of calcium-coated beads of polystyrene pockmarked with small nucleation sites (the "template" in TAC). Calcium and bicarbonate ions will crystallize at the nucleation sites, forming "soft scale" which will drift through plumbing without accumulating or interfering with energy transfer. The OneFlow can handle water with a maximum hardness of 75 grains and temperatures ranging from 41°F–140°F. Single-unit systems can handle 1–75 gpm, while commercial systems can handle up to 900 gpm.
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