Victaulic coupling size 1 " A Victaulic coupling is a type of mechanical pipe coupling used to connect pipes in various systems without welding. It consists of two halves with grooved ends that fit together around the pipe ends. Bolts are used to secure the halves, creating a tight and reliable connection. Victaulic couplings are known for their speed of installation, flexibility, and suitability for various pipe materials. They're commonly used in plumbing, HVAC, and industrial piping systems.