BSP 90° Union Elbow in 304 Stainless Steel — Change Direction Without Cutting Your Pipe Run
Plumbers, maintenance technicians, and DIY homeowners know the frustration of a fixed elbow that locks you into a permanent pipe layout. When equipment needs servicing or a line needs rerouting, a standard elbow means cutting, re-threading, and starting over. This 304 stainless steel 90° union elbow with BSP threading solves that problem by combining a direction change with a serviceable union joint — so you can disconnect the fitting at any time without disturbing the rest of the pipe run.
Each fitting is machined from Grade 304 stainless steel and features a male × female BSP threaded union elbow configuration. Available in eight BSP nominal sizes from BSP 1/4" (DN8) through BSP 2" (DN50), covering the most common residential and light commercial pipe diameters. The 90° turn is built into the body, making this a single-piece solution for corner transitions in tight spaces.
Typical applications include BSP pipe fitting for water supply lines, compressed air distribution, gas line service connections, and industrial fluid transfer systems where future access is required. The union elbow is also widely used in stainless steel plumbing adapter setups for food-grade or sanitary environments where corrosion resistance and cleanability matter.
🔗 Thread Standard: BSP (British Standard Pipe) — BSPP (parallel) thread form, 55° Whitworth profile. Compatible with BSP-threaded pipes and fittings in stainless steel, brass, copper, and galvanized steel. Not directly compatible with NPT threads — use a BSP-to-NPT adapter if needed.
⚠️ Size Note: BSP nominal sizes refer to bore diameter, not thread OD. Measure your existing thread OD or port ID and match to the BSP size chart before ordering. Select your size from the variant options above, or contact us to confirm.
✅ Key Features of These BSP 90° Union Elbow Pipe Fittings
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🔩 Union Design for Easy Serviceability — The union joint lets you disconnect the elbow without cutting or unthreading the entire pipe run, making it ideal for maintenance access points and equipment connections.
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📐 True 90° Direction Change — Machined to a precise 90° angle, this fitting redirects flow cleanly in confined spaces where a straight run isn't possible — no additional elbow needed.
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🛡️ 304 Stainless Steel Construction — Resists rust, oxidation, and mild chemical exposure. Suitable for water, compressed air, gas, and light industrial fluids in both indoor and outdoor installations.
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🔄 Male × Female BSP Thread Configuration — One end is male (external thread), the other is female (internal thread), allowing direct in-line installation into existing BSP-threaded pipe systems without additional adapters.
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📏 Wide Size Range — BSP 1/4" to BSP 2" — Eight sizes covering DN8 through DN50 mean you can match the fitting to your existing pipe diameter rather than adapting around a limited selection.
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🏭 Versatile Across Applications — Used in residential plumbing, compressed air lines, food-grade fluid systems, and light industrial pipe networks where a stainless steel BSP pipe fitting adapter with a direction change is required.
📐 Technical Specifications — 304 SS 90° Union Elbow BSP Pipe Fitting
| Material |
304 Stainless Steel (18-8) |
| Fitting Type |
90° Union Elbow |
| Thread Standard |
BSP (British Standard Pipe) — BSPP parallel thread |
| Thread Configuration |
Male × Female (M/F) |
| Available Sizes |
BSP 1/4" (DN8), 3/8" (DN10), 1/2" (DN15), 3/4" (DN20), 1" (DN25), 1-1/4" (DN32), 1-1/2" (DN40), 2" (DN50) |
| Thread Angle |
55° Whitworth form |
| Elbow Angle |
90° |
| Surface Finish |
Brushed / machined stainless |
| Working Pressure |
Typically up to 150 PSI (≈10 bar) — contact us to confirm for your application |
| Compatible Media |
Water, compressed air, gas, light industrial fluids (non-aggressive) |
| Sold As |
1 piece per order (select size above) |
| Country of Origin |
See variant options |
❓ Frequently Asked Questions
How do I choose the right BSP size for my pipe?
BSP sizes refer to the nominal bore of the pipe, not the actual thread outer diameter. For example, a BSP 1/2" fitting typically has a thread OD of approximately 20.9mm (≈0.82"). Measure the OD of your male thread or the ID of your female port, then match it to a BSP nominal size chart. When in doubt, select the variant option above or contact us to confirm before ordering.
What pressure rating does this 90° union elbow handle?
304 stainless steel BSP fittings of this type are generally rated for working pressures up to 150 PSI (≈10 bar) in standard plumbing and low-pressure industrial applications. Actual ratings depend on pipe wall thickness, temperature, and the connected system. For high-pressure or steam applications, please contact us to confirm suitability.
Can this fitting be used outdoors or in wet environments?
Yes. 304 stainless steel offers good corrosion resistance in most outdoor and wet environments, performing well against rain, humidity, and mild chemical exposure. For coastal or highly chlorinated environments, 316 stainless steel is generally recommended for superior salt-spray resistance. Contact us if you need a 316 SS option.
Is BSP thread compatible with NPT (National Pipe Thread) fittings?
BSP and NPT threads are not directly interchangeable. While some sizes appear similar in diameter, the thread angle differs — BSP uses a 55° Whitworth form while NPT uses 60°. Mixing them can result in leaks or cross-threading. Use a dedicated BSP-to-NPT adapter if you need to connect the two standards.
Is this a union-style elbow — can I disassemble it without cutting the pipe?
Yes. The union design allows you to disconnect the fitting without cutting or unthreading the entire pipe run. This makes it ideal for maintenance access points, equipment service connections, and anywhere future serviceability is a priority. Simply unscrew the union nut to separate the joint.
What thread sealant should I use with this fitting?
PTFE (Teflon) tape or a thread sealant paste rated for stainless steel and your intended media (water, gas, oil) is typically recommended. Apply 2–3 wraps of PTFE tape in the direction of the thread. Avoid over-tightening, which can strip threads or crack fittings. For gas applications, use a sealant specifically rated for gas service.
What pipe materials is this fitting compatible with?
This BSP union elbow is compatible with stainless steel, copper, brass, and galvanized steel pipes that use BSP threading. It is generally not recommended for direct connection to aluminum pipe without an isolation fitting, as galvanic corrosion may occur over time in wet environments.
🛒 Select your size (BSP) above, then add to cart — ships from our US warehouse.
