Check Valve Cartridge, 2/pk Back Catalog number: CTS-10493 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-10560 Seal Wash Plunger Seal, Alliance, 2/pk Price on request CTS-10963 Gold Plunger Seal Price on request CTS-21480 Check Valve, Cartridge Price on request