Inlet Check Valve Cartridge Back Catalog number: CTS-0621 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-1599 Check Valve Assembly, Outlet Price on request 11-4121 Ceramic Plunger Holder Assembly, LC-10ADvp Price on request 11-1602 Seal, Polyethylene, High Pressure, Piston Price on request