Western Series PIPECONX Western Series Center Stop Couplings and Bushings have a center stop design with bushing inserts. They are made of flexible PVC and are sized for West Coast Clay. Sales # Type Size PCX81-44 Coupling 4” x 4” Specialty Couplings Expansion Joints Flexible Couplings/ Corrugated Non-Shear RCX Series Couplings Non-Shear SR Series Couplings Shielded Couplings Socket to Pipe Socket to Socket Western Series Where to Buy