Stainless Steel BSP Reducing Bushing — Male to Female Thread Pipe Fitting (1/4" to 2")

Select the size combination that matches your existing pipe threads. The first number in the variant name is the male (outer) thread and the second is the female (inner) thread. For example, "1" to 1/2"" means the bushing has a 1" BSP male thread on the outside and a 1/2" BSP female thread on the inside.

BSP sizes are nominal — a 1/2" BSP male thread has an actual OD of approximately 20.9mm (≈0.82"). If you're unsure, use a thread pitch gauge or caliper to measure your existing fitting, then match to the BSP nominal size chart.

These bushings use BSP (British Standard Pipe) threads — the same standard used across the UK, Australia, much of Asia, and many industrial systems worldwide. BSP threads are generally not compatible with NPT (National Pipe Thread) fittings commonly used in North America. The thread pitch and angle differ, so mixing the two can result in cross-threading or leaks. If your system uses NPT, you'll need a BSP-to-NPT adapter.

Yes. Stainless steel offers strong resistance to rust and oxidation, making these fittings suitable for outdoor plumbing, irrigation systems, and environments exposed to moisture. In highly corrosive conditions — such as saltwater exposure or chemical processing — contact us to confirm the specific stainless grade before ordering.

Stainless steel BSP reducing bushings typically handle working pressures ranging from approximately 150 PSI to over 1,000 PSI depending on size — smaller sizes generally support higher pressure ratings due to thicker wall-to-diameter ratios. For critical or high-pressure applications, contact us to confirm the rating for your specific size combination before installation.

Stainless steel BSP fittings are commonly used in gas piping systems in many regions. However, always verify your local building codes and regulations before installing any threaded fitting in a gas line. Use a thread sealant rated for gas service (not standard plumber's tape alone). When in doubt, consult a licensed plumber or gas fitter.

Yes — for a leak-free connection, it is generally recommended to apply PTFE (Teflon) tape or a compatible thread sealant compound to the male threads before assembly. Wrap PTFE tape in the direction of the thread (clockwise when looking at the end of the male thread) for 2–3 layers. This is standard practice for BSP threaded pipe fittings in both water and gas applications.

Installation typically requires a pipe wrench or adjustable wrench sized to fit the hex body of the bushing. Apply PTFE tape to the male threads, hand-tighten first, then use a wrench to snug the fitting — generally 1–2 additional turns past hand-tight is sufficient for most water and air applications. Avoid over-tightening, which can stress the threads or crack adjacent fittings.