Reference Valve Rebuild Kit Back Catalog number: CTS-5746 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-21089 Needle Seal (For pH 1-14, for operation up to 130 Price on request CTS-10493 Check Valve Cartridge, 2/pk Price on request CTS-11265 Kit S200 Standard Pump Seals Price on request