Check Valve Cartridge, 2/pk Back Catalog number: CTS-10600 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-11434 Sapphire Plunger Price on request CTS-10770 Waste Valve, V3 (2 Way Solenoid Valve) Price on request CTS-21577 PM Kit, G1367E Price on request