Check Valve Cartridge, 2/pk Back Catalog number: CTS-10493 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-10693 Plunger Seal Price on request CTS-A103 Outlet Check Valve Price on request CTS-A11372 Tube Assy, Transducer to Check Valve, I2V Price on request