Check Valve Cartridge, Ceramic Ball & Seat, 2/pk Back Catalog number: 11-2401 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-4133 Gold Plunger Seal Price on request CTS-10770 Waste Valve, V3 (2 Way Solenoid Valve) Price on request CTS-11265 Kit S200 Standard Pump Seals Price on request