Bag vessel assembly keeps your filter system on stream longer by reducing bag filter rill change time. The single large acme thread closure ensures quick opening and positive sealing. Light enough to be portable. The bag vessel's economical price allows you to install a preferred duplex system for totally uninterrupted flow rates. Made of light weight corrosion resistant polypropylene to give you all the strength you need without bulk. Fixed-head mounting, compact enough to attach to any machine.