Outlet Check Valve Back Catalog number: CTS-A121 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-11141 ACQUITY SM Performance Maintenance Kit, 700005236 Price on request CTS-21012 Compression Screws & Ferrules, 1/16", SS, 5/pk Price on request CTS-0720 Inlet Check Valve Assembly Price on request