Check Valve Cartridge, 2/pk Back Catalog number: CTS-10493 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-A11342 Tube Assembly, Transducer to Check Valve Price on request 11-3832 Wash Seal, PE, 1220, 1260, 1290 Price on request CTS-21171 Rotor Seal, H-Assy, 6 Port 2-Position Price on request