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The Wallbarn Coupling Right Angle Square Spigot is perfect for connecting a through-wall outlet with a square spigot at a right angle to a rounded drainpipe. It connects the square spigot to the square mouth of the coupling, while the round downpipe section links to the HDPE pipe. For extra security, you can add a jubilee clip around the drainpipe. This coupling allows rainwater flow from through-wall or corner fittings into HDPE vertical drainpipes. It has four internal wings that lock outlet walls securely for stable connections without long-term shape distortion. Made from PP (Polypropylene) and recyclable materials, it resists degradation from sunlight, ozone, and chemicals. It performs reliably in temperatures from -20C to 70C, maintaining flexibility without becoming brittle. Available in various sizes, it offers durability and long-term mechanical performance.. Wallbarn Coupling Right Angle Square Spigot - 100mm x 100mm x 100mm