The 3G UV Wastewater Disinfection Unit from Salcor is for residential, commercial and municipal uses, and is UL certified NEMA 6P flood-proof and NSF/Washington State Protocol 6-month-tested (with 21 upstream treatment systems). It inactivates pathogens, including superbugs. Rated at 9,000 gpd gravity flow, it is a reliable building block for large water recovery/reuse systems, according to the maker. When installed in 12-unit parallel/series arrays with ABS pipe fittings, systems are disinfecting over 100,000 gpd. Gravity flow equalizes without distribution boxes. Each unit has a foul-resistant Teflon lamp covering, two-year long-life lamp, easy installation, minimal annual maintenance, and energy usage of less than 30 watts. 760/731-0745.