Check Valve Cartridge, 2/pk Back Catalog number: CTS-A094 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-A11336 Cartridge, Intelligent Valve Price on request CTS-A11431-02 Cartridge Check Valve Housing, 2/pk Price on request CTS-A121 Outlet Check Valve Price on request