Check Valve Cartridge, 2/pk Back Catalog number: CTS-10493 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-21012 Compression Screws & Ferrules, 1/16", SS, 5/pk Price on request CTS-10988 2690/2695 Performance Maintenance Kit Price on request PL7025150 MarvelXACT™ PLS 25µm x 150mm Price on request