Outlet Check Valve Back Catalog number: CTS-A11187 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-3601 ACQUITY H SM-FTN Performance Main. Kit,700005236 n Price on request CTS-10600 Check Valve Cartridge, 2/pk Price on request CTS-11282 1525 Performance Maintenance Kit Price on request