Inlet Check Valve Cartridge Back Catalog number: CTS-0621 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-11119-02 Head Plunger Seal, 2/pk Price on request 11-4134 Rotor Seal & Pod Repair Kit, Vespel, 3-Groove for Price on request CTS-11335 ACQUITY H-Class QSM Performance Maintenance Kit Price on request