Brass Ball Valve Shut-Off Fittings — Reliable Flow Control for Water, Air & Fuel Lines
When a leaking connection or a stuck valve brings your project to a halt, the right fitting makes all the difference. Whether you're a plumber routing copper lines, a DIYer building a compressed air system, or a mechanic routing fuel lines, these brass ball valve shut-off fittings give you precise, tool-free flow control exactly where you need it.
Each fitting is machined from solid brass and features a quarter-turn ball valve mechanism for instant on/off control. Available in NPT thread sizes of 1/8" (≈3.2mm), 1/4" (≈6.4mm), and 3/8" (≈9.5mm), as well as metric barb tail sizes of 6mm, 8mm, 10mm, and 12mm. Configurations include Female × Male, Female × Female, Male × Male, and barb-tail unions — sold individually or in value packs of 2, 3, 5, or 10 pieces.
Ideal for residential plumbing shut-off valves, compressed air line isolation, garden irrigation control, RV water systems, and small-engine fuel line management. These NPT brass ball valve fittings are a go-to solution for anyone who needs dependable inline flow control without bulky hardware.
🔗 Compatibility: NPT variants are compatible with standard US pipe threads (1/8" NPT, 1/4" NPT, 3/8" NPT). Metric barb variants fit hoses with matching inner diameters (6mm, 8mm, 10mm, 12mm ID). Use PTFE tape on NPT threads; secure barb connections with a hose clamp.
✅ Key Features of These Brass Ball Valve Shut-Off Fittings
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🔩Solid Brass Construction — Machined from lead-free brass alloy for durability in water, air, and light fuel applications without rust or scale buildup.
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🔄Quarter-Turn Ball Valve — A 90° lever rotation opens or closes flow completely, giving you fast, positive shut-off control on any inline connection.
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📐Multiple Size & Configuration Options — Choose from 1/8", 1/4", or 3/8" NPT in male/female combos, or 6–12mm metric barb tails, covering the most common DIY and trade fitting scenarios.
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🛡️Leak-Resistant Seat Design — The ball valve seat is generally engineered to maintain a tight seal under working pressure, reducing the risk of drips at connection points.
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📦Flexible Pack Quantities — Available in packs of 1, 2, 3, 5, or 10 — order exactly what your job requires, from a single repair to a full system build-out.
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⚙️Broad Application Range — Suited for residential plumbing, compressed air lines, irrigation systems, RV water hookups, and small-engine fuel shut-off valve replacements.
📐 Technical Specifications — Brass Ball Valve Fittings
| Material |
Brass (lead-free alloy) |
| Valve Type |
Quarter-turn ball valve |
| NPT Thread Sizes |
1/8" NPT, 1/4" NPT, 3/8" NPT |
| Metric Barb Sizes |
6mm, 8mm, 10mm, 12mm (barb tail OD) |
| Configurations |
Female × Male, Female × Female, Male × Male, Barb × Barb (union), Male × Barb |
| Working Pressure |
See variant options (typically up to 200–600 PSI depending on size) |
| Working Temperature |
Contact us to confirm for your specific media |
| Compatible Media |
Water, compressed air, natural gas, propane, light fuel oils |
| Thread Standard |
NPT (American National Pipe Taper) / Metric barb |
| Finish |
Natural brass |
| Pack Quantities |
1, 2, 3, 5, or 10 pieces per order |
| Sealant Required |
PTFE tape recommended for NPT threads; hose clamp for barb connections |
⚠️ Note: If you are unsure which size or configuration fits your system, measure your existing pipe thread OD or hose ID before ordering. Contact us and we'll help you confirm the right fit.
❓ Frequently Asked Questions
How do I choose the right size brass ball valve fitting?
Match the fitting size to your existing pipe or hose thread. NPT sizes (1/8", 1/4", 3/8") refer to nominal pipe thread diameter — measure your pipe OD and compare to a thread chart. For barb fittings, match the barb OD to your hose ID (e.g., an 8mm barb fits an 8mm ID hose). When in doubt, 1/4" NPT is the most common size for residential water and air lines.
What pressure can these brass ball valve fittings handle?
Brass ball valve fittings of this type are generally rated for up to 200–600 PSI depending on size and configuration. Smaller NPT sizes (1/8") typically handle higher pressures than larger ones. For your specific application, confirm the rated working pressure with the product specifications or contact us.
Are these fittings suitable for outdoor or corrosive environments?
Brass offers good corrosion resistance for most indoor plumbing, compressed air, and fuel applications. For prolonged outdoor exposure or highly corrosive media (saltwater, strong acids), stainless steel fittings are generally recommended. In most standard outdoor DIY or irrigation setups, brass performs reliably.
What thread standard do these fittings use — NPT or BSP?
The NPT variants (1/8", 1/4", 3/8") use American National Pipe Taper (NPT) threads, which are the standard for US plumbing and pneumatic systems. NPT and BSP threads are not interchangeable. The metric barb variants (6mm, 8mm, 10mm, 12mm) use push-on or clamp-style hose connections compatible with standard metric hose ID sizes.
Do I need Teflon tape or thread sealant with these fittings?
Yes — for NPT threaded connections, applying 2–3 wraps of PTFE (Teflon) tape to the male threads before assembly is generally recommended to ensure a leak-free seal. Barb fittings should be secured with a hose clamp for best results. Do not overtighten brass fittings, as this can crack the body.
What fluids are these brass ball valve fittings compatible with?
These fittings are typically compatible with water, compressed air, natural gas, propane, and light fuel oils. They are not recommended for use with strong acids, chlorinated solvents, or ammonia-based fluids. Always verify compatibility with your specific media before installation.
What is the difference between a male and female fitting end?
A male fitting has external threads that screw into a female port. A female fitting has internal threads that accept a male connector. When selecting your configuration (e.g., 1/4" Female × 1/4" Male), match each end to the corresponding port on your equipment or pipe.
Can I use these fittings for natural gas or propane lines?
Brass ball valve fittings are in many cases used for natural gas and propane applications in residential settings. However, local codes vary — in some jurisdictions, gas line fittings must be specifically rated and certified. Always check your local plumbing and gas codes, and consult a licensed professional if you are unsure.
🛒 Select your size and quantity above, then add to cart — ships from our US warehouse.
