The ALS Hardware Galvanised Johnson Coupling is a heavy-duty, threadless pipe repair and connection fitting engineered to establish a secure, leak-free inline transition between two plain-ended steel pipes. Built from -grade malleable iron with a hot-dipped zinc galvanised coating, it delivers outstanding protection against rust, corrosion, mechanical stress, and harsh outdoor conditions. Featuring internal heavy-duty rubber gaskets and a compression-style collar setup, it slips easily over standard 40mm pipelines to bridge gaps, absorb structural vibrations, and accommodate minor thermal expansions without the need for welding or precise threading work. This durable mechanical coupling is highly recommended for commercial water infrastructure, agricultural irrigation layouts, gas pipelines, and quick plumbing remediation projects. Item Size: 40mm | Pack Size: 1 Unit