| A1waterfilters: Offers residential water filters, shower filters, house water filters, air purifiers and air cleaners. |
| Ace Pump Corp.: Water filtration, reverse osmosis systems and bottle-less water coolers from the worlds leading manufacturers that will provide clean and safe water for drinking, cooking and showering. |
| American Water Heater Company: Sales of water heaters, parts and accessories. Includes sizing and troubleshooting guides and water heater diagrams. |
| Aquatechnology Water Stores: An informative site dedicated to accurate and educational resources along with a full product line of water treatment equipment. |
| Avonsoft Water Treatment: Manufacturers of domestic and industrial water softeners. Suppliers of Doulton and Berkefeld ceramic bacteriological water filters and spare candles. All types of filters supplied. |
| BuyRO: Source for reverse osmosis Pure Plus water systems. |
| Catalytic Water Softeners: Hassle-free soft water without salt, electricity or chemicals. Manufacturer of premium catalytic water softeners since 1988. Money-back guarantee. |
| Cordonna Associates, Inc.: Water treatment products and information - water softeners, reverse osmosis systems, ultraviolet disinfection, iron filters. |
| DaSu Distributing: Offers tankless water heaters and on demand hot water heater systems. Featuring gas and electric. |
| Fleckvalves: Home and industrial water treatment equipment including softening, filtration, reverse osmosis. Water systems for Kidney Dialysis Centers and patients are also available. |
| Harvest Water: Sells reverse osmosis systems. |
| Magnetic Water Treatment and Filtration Products: Suppliers of simple to fit magnetic water softeners, reverse osmosis water purification and filtration equipment for home and industrial use. |
| National Testing Laboratories, Ltd.: Independent testing lab for home drinking water potability and well water. Products and information available for residential and commercial. |
| Ozone Pure Water: Offers water purification systems to eliminate iron, sulfur, manganese, and bacteria. For residential, commercial, and industrial water problems. |
| Premier Water Systems: Reverse osmosis water purification products, parts and filters. Includes FAQs and troubleshooting guide. |
| Purco Filtration Systems Inc.: Water treatment and purification systems for residential, commercial and engineered applications. |
| Pure Water Canada: Information about water purification and treatment with system sales available. |
| PurePro USA Corporation: Buyer's guide for home reverse osmosis water filter systems. |
| Reid Hester: Offers GMX water softeners based on magnetohydrodynamics. |
| Sanosil: Sales of water purification devices, and information about the company and its disinfectant products. |
| SpectraPure: Reverse osmosis and deionization water purification products. Includes general production information and company profile. |
| Trentatronics: Manufactures and supplies of magnetic water conditioners. |
| Water Filtration: Suppliers and Installers of domestic and commercial water filtration systems, water softeners and water conditioners. |
| Water Refining Company: Specializes in quality water conditioning equipment such as water softeners, filters, reverse osmosis and aerators. |
| Water Value Company: Filtration equipment, parts, and replacement filters. Also information on installation, repair, owner's manuals, and articles on drinking water contamination. |
| WaterGeneral: Features a reverse osmosis system which includes water quality TDS meter. Also links to replacement filters and membranes for some popular brands. |
| Worldwide Water Systems: Water softeners, filters, home test kits, and reverse osmosis systems. |
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