Check Valve Cartridge, Ceramic Ball & Seat, 2/pk Back Catalog number: 11-2401 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-A121 Outlet Check Valve Price on request 11-1602 Seal, Polyethylene, High Pressure, Piston Price on request CTS-2294 Plunger Seal Price on request