Check Valve, Secondary Inlet Back Catalog number: 11-1600 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-11149 Needle Seal O-Ring, 002 Kalrez Price on request CTS-A11133 Tube Assembly, Transducer to Check Valve Price on request CTS-21012 Compression Screws & Ferrules, 1/16", SS, 5/pk Price on request