SHU Universal Series filter housings from Delta Pure Filtration accept three styles of filter elements: DOE (double open end), 2X size 222 O-rings with flat top, or single internal O-ring (size 119 or 213) with flat top. These single-element industrial filter housings combine the robustness of 304 or 316 stainless steel construction with the economics of a streamlined design. The housings employ an easy to use ring-nut closure with a reliable double seal. These rugged housings are great for commercial hot water, industrial chemical and other applications requiring a robust filter vessel. They accept filters of up to 2.75-inch (6.9 cm) diameter and lengths of 9.75/10 (24.7/25.4 cm), 20 (50.8 cm) or 30 inches (76.2 cm). A spring-loaded bottom seal provides flexibility to allow for slight filter length variations among filter brands. Inlet/outlet are 0.75- or one inch (1.9 or 2.5 cm) fNPT. Drains are 0.25-inch (0.6-cm) fNPT. Housings are compatible with a wide range of fluids and come standard with EPDM O-rings. Viton® or equivalent FKM elastomer, as well as FDA silicone also available. Various filter cartridge types can be installed, including string wound, melt blown, pleated, carbon, resin bonded, stainless steel and others. http://www.deltapure.com, (800) 785-9450