Pentair Pentek Standard Bag Vessel Assemblies keep your system on stream longer by reducing bag filter change time. They are made of lightweight corrosion resistant polypropylene to give you all the strength you need without the weight. Install as a duplex system for totally uninterrupted flow rates. All PBH Series Vessels come complete with gauge, wrench and 3/8" drain valve. The single large ACME thread closure ensures quick opening and positive sealing. Filter bags are available in polypropylene felt, absolute-rated high efficiency polypropylene and nylon monofilament mesh—ideal for filtering and straining applications from 1-800 microns. Molded from rugged reinforced polypropylene, Bag Vessel Filter Housings offer outstanding chemical compatibility and are ideal for use in a variety of low-flow applications. These applications include residential pre-filtration, food service, along with commercial and industrial applications for water filtration and chemical filtration. They are equipped with a black reinforced polypropylene cap.