Inlet Check Valve Cartridge Back Catalog number: CTS-0621 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-11141 ACQUITY SM Performance Maintenance Kit, 700005236 Price on request CTS-0720 Inlet Check Valve Assembly Price on request CTS-21406 Peristaltic Pump Cartridge, WPS/AC Price on request