Pentek ST-3 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 275°F (135°C). The material used to construct the housing is a brushed 304 stainless steel sump with either a pipe plug or pet-cock in the bottom for draining. The housings are shipped with the drain plug installed. The pet-cock is packaged loose in the carton.