Brand New HQUA-OWS-12 Ultraviolet Water Purifier Sterilizer Filter for Whole House 12GPM 110V 40W Model HQUA-UV-12GPM + 1 Extra UV Tube. 40W 12GPM unit, 37.22.5 in stainless steel chamber, 3/4 (DH20, OD 1.05 inch, 26.67cm) MNPT inlet/outlet. Easy installation, No plumber needed. Horizontal installation and metal connector for the inlet/outlet is recommended. NO CHLORINE, Chemical Free and Environmentally Friendly. No change at taste, color, odor, PH. Safety and Reliable, 304 stainless steel and Quartz glass are proved to be reliable in different temperature, pressure, pH. And the only materials that will contact with your water.