Check Valve Cartridge, 2/pk Back Catalog number: CTS-10600 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-21163 Rotor Seal, 2-Groove Price on request CTS-11380 2690/2695 Performance Maintenance Kit w/Seal Pack Price on request CTS-A117 Inlet Check Valve Price on request