Brass Y-Piece 3-Way Reducer Joiner — Split or Merge Any Air, Gas, Fuel, or Water Line
Whether you're routing compressed air to two tools at once, splitting a fuel line in a small engine build, or branching a water supply in a tight plumbing run, finding a reliable brass 3-way Y reducer joiner that actually seals without leaking is harder than it should be. This fitting is built for DIYers, mechanics, and hobbyists who need a compact, durable solution that works the first time.
Each piece is machined from solid brass and features a Y-shaped 3-way body that allows one inlet to split into two outlets — or two lines to merge into one. Available in outer diameter (OD) sizes from 4mm (≈5/32") to 19mm (≈3/4"), these fittings cover a wide range of tubing and hose diameters. Order in packs of 1, 3, 5, 10, or 20 pieces to match your project scale.
Typical use cases include air compressor line splitting for workshop setups, fuel line branching in carbureted engines and small machinery, water distribution in irrigation or aquarium systems, and gas line routing in DIY propane or pneumatic builds — all scenarios where a compact brass Y pipe fitting for air and gas lines saves time and eliminates improvised solutions.
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Compatibility Note: These fittings are sized by outer diameter (OD) of the tubing or hose. Measure your existing tube OD with calipers before selecting a size. Available OD sizes: 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 19mm.
✅ Key Features of These Brass Y-Piece 3-Way Reducer Joiner Fittings
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🔩Solid Brass Construction — Machined from brass for durability, natural corrosion resistance, and reliable performance in air, gas, fuel, and water line applications.
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🔀True 3-Way Y Design — Splits one line into two or joins two lines into one, making this brass Y pipe fitting ideal for branching compressed air or fuel systems without additional adapters.
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📏Wide Size Range (OD 4mm–19mm) — Eight OD sizes cover most standard tubing and hose diameters used in pneumatic, hydraulic, fuel, and water plumbing setups.
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💧Multi-Media Compatible — Suitable for use with air, gas, fuel, and water lines, making these fittings versatile across automotive, workshop, irrigation, and aquarium applications.
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📦Flexible Pack Quantities — Available in 1, 3, 5, 10, or 20-piece packs so you can order exactly what your project requires — from a single repair to a full system build.
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🚀Ships from US Warehouse — Stocked domestically for faster delivery, so your project doesn't stall waiting on overseas shipping.
📐 Technical Specifications — Brass 3-Way Y Reducer Pipe Fitting
| Material |
Brass |
| Fitting Type |
Y-Piece 3-Way Reducer / Joiner (Barbed / Push-Fit) |
| Available OD Sizes |
4mm (≈5/32"), 6mm (≈1/4"), 8mm (≈5/16"), 10mm (≈3/8"), 12mm (≈15/32"), 14mm (≈9/16"), 16mm (≈5/8"), 19mm (≈3/4") |
| Pack Quantities |
1 Pcs, 3 Pcs, 5 Pcs, 10 Pcs, 20 Pcs |
| Compatible Media |
Air, Gas, Fuel, Water |
| Connection Style |
Barbed / Push-Fit (secure with hose clamp) |
| Thread Standard |
See variant options — barbed OD sizing, no thread |
| Working Pressure |
Contact us to confirm for your specific application |
| Finish |
Natural brass |
| Country of Origin |
See variant options |
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Sizing Tip: Always measure your tubing's outer diameter (OD) with calipers before ordering. Do not rely on nominal pipe size (NPS) alone — actual OD may differ. When in doubt, contact us before purchasing.
❓ Frequently Asked Questions
How do I choose the right OD size for my pipe fitting?
Measure the outer diameter (OD) of your existing tubing or hose with calipers. This product is sized by OD, ranging from 4mm (≈5/32") to 19mm (≈3/4"). Match the OD measurement to the variant you select. If you're between sizes, generally choose the smaller size and use a sealant or compression sleeve for a snug fit.
What pressure rating can these brass fittings handle?
Brass push-fit and barbed Y fittings of this type typically handle working pressures up to 150 PSI for air and water applications under normal conditions. For fuel or gas lines, always verify the pressure rating against your system specs. Contact us to confirm if you have specific pressure requirements.
Are these fittings suitable for outdoor or corrosive environments?
Brass offers good natural corrosion resistance and is generally suitable for outdoor use in moderate climates. It performs well with water, air, and most fuels. For highly corrosive or saltwater environments, additional protective measures or stainless steel alternatives may be more appropriate.
What thread or connection standard do these fittings use?
These are barbed/push-fit style Y fittings sized by outer diameter (OD). They are designed to slip over tubing or hose of the matching OD and are typically secured with hose clamps or zip ties. They do not use threaded connections. Confirm your tubing OD before ordering.
Can I use these for fuel lines in automotive applications?
Brass is generally compatible with gasoline, diesel, and many other fuels. These fittings are commonly used in small engine fuel systems, carbureted vehicles, and DIY fuel routing. Always verify compatibility with your specific fuel type and ensure connections are secured with appropriate clamps for safety.
How many pieces do I need to order, and can I mix sizes?
Each variant is sold in packs of 1, 3, 5, 10, or 20 pieces of the same OD size. To get multiple sizes, simply add each size variant to your cart separately. Buying in larger packs (10 or 20 pcs) typically offers a lower per-piece cost.
Where do these ship from, and how long does delivery take?
All orders ship from our US warehouse. Standard delivery typically takes 3–7 business days depending on your location. Expedited options may be available at checkout.
🛒 Select your size (OD) and quantity above, then add to cart — ships from our US warehouse.
