Wilkins Model FP23 couplings join together grooved pipe, fittings, valves, and accessories. FP23 couplings are available in Rigid Angle Pad, Flexible, and Reducing options. • Rigid Angle Pad Couplings provide sturdy inflexible joints comparable to flanged, welded, or threaded connections. They are designed to prevent angular and axial deflection of connected pipes. • Flexible Couplings allow joints to flex at the connection without leakage. They meet flexure requirements for structural settling, inter-building piping, and seismic motion. • Reducing Couplings provide a flexible style joint between pipes of different sizes. Each reducing coupling makes a connection that would otherwise require two separate couplings and a reducer.