Seal Extension Tube Back Catalog number: 11-2569 Manufacturer: SCIENCIX Availability: In the manufacturer's stock Price on request - + Recommended CTS-10493 Check Valve Cartridge, 2/pk Price on request CTS-10560 Seal Wash Plunger Seal, Alliance, 2/pk Price on request CTS-A11431-02 Cartridge Check Valve Housing, 2/pk Price on request