Cartridge tubes and end caps are constructed of 100% virgin polypropylene and are designed for nonpressure applications.
Cartridges include 9.5 mm (3/8") barbed hose connections on each end.
All cartridges contain dyes which change color when resin is exhausted, with the exception of the Organic Removal Cartridge.
Note: Nonpressure refers to the inability of the cartridges to accept back pressure. Output water must be diverted to an atmospherically-vented receptacle.