Check Valve Assembly, Outlet Back Catalog number: 11-1599 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-21463 Check Valve Cartridge, Ceramic, 2/pk Price on request CTS-10686 Needle Seal, Vespel® Price on request CTS-11371 ACQUITY I2V BSM Performance Maintenance Kit Price on request