Industrial quality filter housings, made to ASME design standards with optional “U?? stamp, are available from Dunnellon, Fla.-based Flowmatic Systems Inc. They come in carbon steel, 304 and 316 stainless steel. Standard models are rated for flow rates to 3,000 gpm, accept standard DOE cartridges or elements with 222 end-caps, and don’t need special adapters. Options include pleated, high purity, wound, melt blown, activated carbon, oil adsorbent, high temp, and phoenolic impregnated cellulose for non-aqueous applications.