O-Ring, PTFE Back Catalog number: CTS-11092 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-21463 Check Valve Cartridge, Ceramic, 2/pk Price on request CTS-1106 Inlet Tube Assembly Kit Price on request CTS-A11431-02 Cartridge Check Valve Housing, 2/pk Price on request