The McAlpine S1 is a 1 1/4" 90 degree bend with BSP (British Standard Pipe) male thread. It is commonly used in plumbing installations to connect pipes and fittings at a 90 degree angle. The S1 bend is made from high-quality materials to ensure it is durable and long-lasting. It has a male thread that is compatible with other BSP fittings and can be easily connected to other pipes or fittings with female threads. The McAlpine S1 bend is designed for use with a range of different liquids and gases, including water, gas, and oil. It is suitable for use in both commercial and residential applications and can be used in a variety of different plumbing systems. Overall, the McAlpine S1 1 1/4" 90 degree bend with BSP male thread is a reliable and durable plumbing fitting that can be used in a wide range of applications. Its high-quality construction and compatibility with other BSP fittings make it a popular choice among plumbers and DIY enthusiasts alike. ・ Available in 1¼", 1½", and 2" sizes