304 Stainless Steel Male to Male BSP Pipe Fitting Adaptor — Equal & Reducing Straight Connector

Measure the outer diameter of your pipe thread and match it to the BSP nominal size. For example, a 1/2" BSP thread has an outer diameter of approximately 20.9mm (≈0.82"). For reducers, select the larger port to match your existing pipe and the smaller port to match the line you're connecting to. When in doubt, use a thread gauge or caliper before ordering.

These adaptors are made from 304 stainless steel, which generally offers good corrosion resistance, strength, and durability for both indoor and moderate outdoor applications.

Yes. 304 stainless steel is typically suitable for outdoor and wet environments. It resists rust and oxidation well in most conditions. For highly corrosive or marine environments, 316 stainless steel is generally recommended instead.

Equal (Straight) fittings connect two pipes of the same size in a straight line. Reducer (Straight) fittings join two pipes of different sizes with both centerlines aligned. Reducer (Eccentric) fittings also join two different pipe sizes but offset the centerlines — useful in drainage or pump installations where you need the bottom of the pipe to remain flat.

These fittings use BSP (British Standard Pipe) threads, which are widely used in plumbing, hydraulics, and pneumatic systems across the US, UK, Australia, and many other regions. BSP threads are not directly compatible with NPT (National Pipe Thread) fittings without a dedicated BSP-to-NPT adapter. Always confirm your existing thread standard before ordering.

The working pressure rating depends on the size and wall thickness of the specific variant. Thickened-wall variants generally support higher pressures than standard-wall versions. For exact pressure ratings for your application, please contact us to confirm before use in high-pressure systems.

Yes. BSP parallel threads (BSPP) typically require PTFE tape or a thread sealant compound to achieve a leak-free seal. BSP tapered threads (BSPT) rely on thread interference for sealing but also benefit from PTFE tape. Always apply sealant before installation to ensure a secure, leak-free connection.

The Thicken variant features a heavier wall thickness for added strength in higher-pressure or heavy-duty applications. The Long variants — 37mm (≈1.46") and 50mm (≈1.97") — provide extra thread engagement length, which is useful when connecting through panels, bulkheads, or thick walls where a standard-length fitting would not reach both sides.