Check Valve Cartridge, Ceramic Ball & Seat, 2/pk Back Catalog number: 11-2401 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-0012 Insert Seal Parts Kit Price on request CTS-21011 Cartridge Check Valve System Kit Price on request PL7050150 MarvelXACT PLS 50µm x 150mm Price on request