Inlet Check Valve Cartridge Back Catalog number: CTS-0621 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-1598 Check Valve Assembly, Inlet Price on request CTS-A11374 Tube Assy, SSV to I2V Price on request CTS-11335 ACQUITY H-Class QSM Performance Maintenance Kit Price on request