Outlet Check Valve Cartridge Back Catalog number: CTS-0620 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-2525 1/4" Short Comp. Screw (Gold-Plated), 10/pk Price on request CTS-A11431-02 Cartridge Check Valve Housing, 2/pk Price on request CTS-10757 High Pressure Seal Kit Price on request