Scott Electric 1" PVC Expansion Coupling is designed to accommodate the thermal expansion and contraction of PVC conduit. This essential coupling is i for long runs of conduit exposed to significant temperature variations, helping to maintain the integrity of the conduit system. It features a maximum extended length of 12.50" and a maximum retracted length of 8.50". For every 100°F change in temperature, a 100' run of pipe will experience a change of 3.6". This coupling ensures the conduit system remains secure and intact despite these temperature-induced changes, providing reliable performance in varying environmental conditions. Model Number: 379897