This brass adapter set includes built in sealing rings for leakproof, perfect for joining multiple pipe sections or keeping as spare parts for plumbing repairs and installations Suitable for residential, commercial, and industrial plumbing systems including water supply, heating, and, suitable for PVC, copper, and stainless steel pipes Features accurately machined internal and external threads for a secure fit with pipes, combined with high elasticity sealing rings to prevents leaks even under high water pressure brass that resists oxidation, and mechanical wear, ensuring long lasting reliability in various environments Easy Installation: Designed for quick setup without special tools, seamlessly connecting 1 inch to 3 / 4 inch pipes while the included sealing rings simplify the process for users, Manufacturer: carotoe