Brass Reducing Hex Bush BSP Fitting — Male to Female Thread Connector, Multiple Sizes

Measure the male thread on the larger pipe (this is your first dimension) and the female thread on the smaller pipe or fitting (this is your second dimension). For example, a 3/4" × 1/2" bush has a 3/4" (≈19mm) male thread and a 1/2" (≈13mm) female thread. All sizes listed use BSP thread, so confirm your existing fittings are BSP-compatible before ordering. When in doubt, a thread gauge or caliper measurement is the most reliable method.

These fittings use BSP (British Standard Pipe) threads, which are widely used in plumbing, hydraulic, and pneumatic systems across the US, UK, Australia, and many other markets. BSP threads are not directly compatible with NPT (National Pipe Thread) fittings without an adapter — mixing the two thread types can result in leaks or damaged threads.

Brass is generally resistant to corrosion and performs well in wet or humid environments. It is typically suitable for water supply lines, garden irrigation, and outdoor plumbing applications. For highly corrosive environments (e.g., saltwater exposure or chemical contact), stainless steel fittings may be more appropriate. Always apply PTFE thread tape to ensure a watertight seal.

Brass BSP hex bush fittings are generally rated for standard residential and light commercial plumbing pressures. Exact pressure ratings depend on the specific size and wall thickness of each variant. If your application involves high-pressure hydraulic or pneumatic systems, please contact us to confirm suitability before ordering.

The Reducer Male & Female variants (#1–#6, #8–#12) have a male (external) thread on the larger end and a female (internal) thread on the smaller end — the standard hex bush configuration used in most plumbing step-down applications. The Reducer Male #7 has male threads on both ends, which suits specific double-male connection scenarios. Review your fitting requirements carefully before selecting.

Yes — applying PTFE thread seal tape (plumber's tape) to the male threads before installation is generally recommended to ensure a leak-free connection. Wrap the tape clockwise around the male thread 2–3 times before threading into the female fitting. For higher-pressure applications, a thread sealant compound may provide additional security.

Yes — each listing offers quantity options of 1, 2, 5, 8, or 10 pieces, with the per-unit price decreasing as quantity increases. Select your preferred quantity from the QTY option above before adding to cart. This makes it cost-effective to stock spares for ongoing maintenance or larger plumbing projects.