You use a PVC expansion coupling by cutting your PVC pipe between the maximum and minimum expansion markings on the coupling.
The video suggests that the key to using a PVC expansion coupling lies in making sure the pipe is cut to a length that falls within the fitting's specified expansion range. For instance, using a one-inch fitting as an example, the cut needs to be between the maximum and minimum expansion points detailed on the coupling. This ensures the coupling can properly accommodate expansion and contraction of the PVC pipe due to temperature changes.
