This listing presents a barbed-threaded elbow accompanied by a nut and washer, specifically designed for use with water butt overflows or waterbutt outlets. The elbow is constructed from durable polypropylene and is available in six barb sizes: 13mm, 19mm, 25mm, 32mm, 40mm, and 50mm. To install this item, you will need to drill a hole through the wall of your water container, with the following corresponding hole sizes for each BSP (British Standard Pipe) measurement: 1/2" BSP = 21mm hole 3/4" BSP = 26mm hole 1" BSP = 33mm hole 1.25" BSP = 41.9mm hole 1.5" BSP = 47.8mm hole 2" BSP = 59.6mm hole To install this item, follow these steps: Begin by removing the nut and washer from the barbed-threaded elbow. Push the elbow through the drilled hole in the water container's wall. Once the elbow is inserted, secure it from the inside of the tank by reattaching the washer and nut. It's important to note that the barb sizes provided refer to the interior diameter of the pipe that fits into them. If the pipe is a tight fit, you can make it easier to install by gently warming it up in hot water. This will soften the pipe and make it more pliable for pushing onto the barb. Once the pipe cools down, it will shrink back to its original size, creating a tight and waterproof seal. High-Quality Construction: The barbed-threaded elbow, nut, and washer in this listing are constructed from durable polypropylene, ensuring longevity and resistance to wear and tear. This high-quality material guarantees reliable performance and durability over time. Versatile Barb Sizes: The elbow is available in six different barb sizes (13mm, 19mm, 25mm, 32mm, 40mm, and 50mm), providing versatility and compatibility with various pipe sizes. This allows you to choose the appropriate size for your specific water butt overflow or outlet, ensuring a snug fit and optimal functionality. Designed for Water Butt Applications: This listing is specifically designed for use with water butt overflows or waterbutt outlets. The elbow's design takes into account the specific requirements of these applications, ensuring efficient water flow and preventing leaks or overflows from your water container. Easy Installation Process: Installing this item is straightforward. With the provided nut and washer, you can easily secure the elbow from the inside of the water container. Additionally, the steps to drill a hole and attach the elbow are clearly outlined, making the installation process hassle-free. Tight and Waterproof Seal: The interior diameter of the barbed elbow provides a tight and secure fit for the pipe. If the pipe is initially a tight fit, the option to warm it in hot water allows for easier installation, ensuring a proper seal. Once cooled, the pipe will shrink back, creating a watertight connection and minimizing the risk of leaks or water seepage. This feature guarantees the integrity of your water system and enhances overall efficiency.