Pentek ST-1 stainless steel filter housings are ideal for hot water and/or high pressure applications. The flow rate of this housing can go as high as 10 GPM and a temperature rating as high as 275F (135C). The material used to construct the housing is a brushed 304 stainless steel sump with either a pipe plug or in the bottom for draining. The housings are shipped with the drain plug installed. The packaged loose in the carton. Comes with a 3/4" inlet/outlet for easy installation and are compatible with a complete range of the standard size 10" x 2.5" filter cartridges (except Pentek GAC, CC, CGAC, TSGAC, WS, PCF or PCC Series filter cartridges)