Straub Couplings are the easiest way to join pipes of all materials. They require no special tools or pipe-end preparation. Flexible, lightweight, 316SS construction; Straub Couplings handle pipe-misalignment, vibration, and are used in shipbuilding, wastewater treatment, general industry, and construction. They will replace welded, flanged, threaded, or grooved type pipe joints. Straub, Hi-Performance Pipe Couplings, are the 21st Century way to join pipes. Available in diameters from 1″ to 120″. Straub Couplings come fully assembled and ready to install. A torque wrench is the only tool required to do the job. The unique lip seal design seals on even rough pipe surfaces. STRAUB couplings are used to join virtually any plain end pipe or tube including steel, stainless steel, ductile iron, FRP, PVC, CPVC, C900, concrete pipe, copper and CuNi piping.