Engineered for seamless connectivity, this transition coupler provides an efficient solution for connecting high-density polyethylene (HDPE) ducts to PVC pipe or fittings. Crafted from durable aluminum, it features a smooth exterior wall that enhances performance and reduces friction. With a nominal size of 4 inches and a robust air-tight rating of 180 psi, this coupler ensures a reliable seal, making it suitable for various pipe and conduit applications. Custom sizes are also available, accommodating specific project needs with ease. Whether you're working on a new installation or a repair, this product stands out for its practical design and reliability.