Inlet Check Valve Back Catalog number: CTS-21145 Availability: In the manufacturer's stock Price on request - + Recommended CTS-21171 Rotor Seal, H-Assy, 6 Port 2-Position Price on request CTS-5531-07 Solvent Bottle Filter, 7/pk Price on request CTS-21089 Needle Seal (For pH 1-14, for operation up to 130 Price on request