Check Valve Assembly, Outlet Back Catalog number: 11-1599 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-A11336-02 Cartridge, Intelligent Valve, 2/pk Price on request CTS-21011 Cartridge Check Valve System Kit Price on request CTS-12016 Compression Screw, 1/16", SS, 10/pk Price on request