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