Check Valve Cartridge, 2/pk Back Catalog number: CTS-10493 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-4134 Rotor Seal & Pod Repair Kit, Vespel, 3-Groove for Price on request CTS-A117 Inlet Check Valve Price on request CTS-10566 Alliance Head Plunger Seal Kit, 2/pk Price on request