Inlet Check Valve Back Catalog number: CTS-A159 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-10759 Piston Seal Backup Ring Price on request CTS-A11431-02 Cartridge Check Valve Housing, 2/pk Price on request 11-2891 PTFE Diaphragm, 2/pk Price on request