BSP Brass Socket Coupler Female x Female Thread Fitting | 1/8" to 1" Sizes

Match the size to your existing pipe thread. The format is Female Port 1 × Female Port 2 — for example, 1/2" × 1/4" means one port is 1/2" BSP and the other is 1/4" BSP. For equal-size connections use a straight coupler (e.g., 1/2" × 1/2"); for reducing connections choose the larger port to match your main line and the smaller port to match your branch line. As a reference, 1" BSP has a nominal OD of approximately 33.2mm (≈ 1.31") and 1/2" BSP is approximately 20.9mm (≈ 0.82").

Brass BSP socket couplers generally handle working pressures up to 200–600 PSI depending on size and application. Smaller sizes typically support higher pressure ratings. Always verify the rated pressure for your specific application and consult a qualified engineer for critical or high-pressure systems.

Brass has inherent corrosion resistance and is generally suitable for outdoor and wet environments. However, prolonged exposure to highly acidic water, salt spray, or ammonia-based environments can cause dezincification over time. For marine or highly corrosive environments, stainless steel alternatives are typically recommended.

No — these fittings use BSP (British Standard Pipe) threads, which are not directly interchangeable with NPT threads. BSP and NPT have different thread angles (55° vs 60°) and pitch. BSP-to-NPT adapters are required if connecting to NPT systems. Always confirm the thread standard of your existing pipework before ordering.

PTFE thread seal tape (plumber's tape) is the most common sealant for BSP parallel threads. Apply 2–3 wraps of PTFE tape in the direction of the thread for a reliable, leak-free seal. For tapered BSP threads (BSPT), thread sealant compound can also be used. Avoid over-tightening, which can crack the fitting body.

Brass fittings are commonly used in low-pressure gas applications (natural gas, LPG/propane) in many regions. However, gas installations are subject to local codes and regulations. Always verify compliance with your local gas authority or a licensed plumber before installing on gas lines. In most cases, a gas-rated thread sealant (not standard PTFE tape) is required for gas connections.

For a single connection point, 1 piece is sufficient. For small projects or to keep a spare on hand, 2 pcs is a practical choice. Packs of 5, 8, or 10 are ideal for contractors, workshops, or anyone maintaining multiple systems — and offer a lower per-unit cost compared to buying individually.