Copper Y-Type 3-Way Pipe Fitting Connector — Reliable End Feed Tees for Plumbing & HVAC
When a leaking joint or a mismatched tee fitting derails a plumbing project, the fix starts with the right connector. Whether you're a professional plumber roughing in a new branch line or a DIYer splitting a copper run for a bathroom addition, these copper Y-type 3-way pipe fitting connectors give you a clean, soldered joint you can trust. They're sized for the full range of residential and light commercial copper pipe work, from compact 8mm (≈5/16") instrument lines up to 42mm (≈1-5/8") main supply runs.
Each fitting is a copper end feed (capillary) Y-type tee. The inner diameter (ID) ranges from 8mm (≈5/16") to 42mm (≈1-5/8") across variants, with wall thickness from 0.9mm to 1.7mm and center distances from 25mm (≈1") to 130mm (≈5-1/8") depending on the size selected. Both equal tees (all three ports the same diameter) and reducing tees (mixed port diameters) are available — check the variant name for the exact Φ run × run × branch dimensions. Sold individually (1 pc), in packs of 5, or packs of 10 for project quantities.
Typical applications include residential hot and cold water supply branching, radiant floor heating manifold connections, HVAC refrigerant line splitting (confirm refrigerant compatibility), and copper irrigation system tees. The end feed design is compatible with standard copper tube conforming to ASTM B88 and EN 1057, making these fittings a go-to choice for copper pipe branch fitting installations across the US.
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Compatibility Note: These are end feed (capillary solder) fittings for copper tube only. Confirm your pipe's outer diameter matches the fitting ID listed in the variant before ordering. Not compatible with PEX, CPVC, or push-fit systems without an adapter.
✅ Key Features of These Copper Y-Type 3-Way End Feed Pipe Fittings
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🔩Wide Size Range — Available from Φ8mm (≈5/16") to Φ42mm (≈1-5/8") ID, covering the most common residential and light commercial copper pipe branch fitting sizes in a single product line.
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🔥End Feed Capillary Design — The smooth socket bore draws solder evenly around the pipe by capillary action, producing a full, void-free joint when proper flux and lead-free solder are used — the standard method for copper plumbing tee installation.
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🌊Corrosion-Resistant Copper Construction — Copper's natural antimicrobial and corrosion-resistant properties make these fittings suitable for potable water, hot water heating, and outdoor plumbing applications without additional coating.
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📐Equal & Reducing Tee Options — Both equal tees (same diameter on all three ports) and reducing tees (mixed port diameters) are available, so you can match the exact pipe sizes in your copper pipe branch fitting layout without improvised adapters.
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📦Flexible Pack Quantities — Order 1, 5, or 10 pieces per variant to match your project scope — single-repair quantities or multi-joint project packs — with per-unit savings on larger quantities.
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🏠Consistent Wall Thickness — Wall thickness is specified per variant (0.9mm–1.7mm), scaled proportionally to the fitting diameter, supporting reliable joint strength across the full size range for both hot water supply line tee and cold water applications.
📐 Technical Specifications — Copper Y-Type End Feed Tee Fittings
| Fitting Type |
Y-Type 3-Way Tee, End Feed (Capillary Solder) |
| Material |
Copper |
| Inner Diameter (ID) Range |
8mm (≈5/16") to 42mm (≈1-5/8") |
| Wall Thickness Range |
0.9mm – 1.7mm (varies by size; see variant) |
| Center Distance Range |
25mm (≈1") – 130mm (≈5-1/8") (varies by size; see variant) |
| Port Configuration |
Equal tee (all ports same Φ) and reducing tee (mixed Φ) — see variant name |
| Connection Method |
End feed capillary solder (lead-free solder recommended) |
| Compatible Pipe Standards |
ASTM B88 (US), EN 1057 (EU/UK) copper tube |
| Typical Working Pressure |
Generally up to 28 bar (≈400 psi) when properly soldered; verify per application |
| Typical Temperature Range |
Generally up to 120°C (248°F); verify with local code |
| Finish |
Natural copper (uncoated) |
| Pack Quantities Available |
1 Pcs / 5 Pcs / 10 Pcs |
| Exact Dimensions |
See variant options (Φ run × run × branch, wall thickness, center distance) |
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Sizing Tip: The three Φ values in each variant name (e.g., Φ16 x 12.7 x 12mm) represent the run inlet, run outlet, and branch outlet inner diameters respectively. Measure your pipe's outer diameter (OD) and confirm it matches the fitting ID before purchasing. When in doubt, contact us to confirm.
❓ Frequently Asked Questions
How do I choose the right size copper Y-type fitting?
Match the fitting's inner diameter (ID) to your copper pipe's outer diameter (OD). For example, a pipe with a 15mm OD typically pairs with a fitting ID of approximately 15mm. Always verify your pipe's actual OD with calipers before ordering. The center distance listed in each variant indicates the overall branch length, which affects how much clearance you need in tight spaces.
What is the pressure rating of these copper end feed fittings?
Copper end feed fittings generally support working pressures up to 28 bar (approximately 400 psi) when properly soldered, though the actual rating depends on pipe wall thickness, solder quality, and installation conditions. For critical or high-pressure systems, consult a licensed plumber and verify against local code requirements.
Can these fittings be used outdoors or in wet environments?
Yes. Copper is naturally corrosion-resistant and is widely used in outdoor plumbing, irrigation, and HVAC applications. These fittings are suitable for both indoor and outdoor use. In areas with aggressive soil chemistry or where the fitting will be buried, wrapping with protective tape is generally recommended.
Are these fittings compatible with standard copper pipe (ASTM B88 / EN 1057)?
These are end feed (capillary) fittings designed for use with copper tube conforming to common standards such as ASTM B88 (US) and EN 1057 (EU/UK). Always confirm the pipe OD matches the fitting ID listed in the variant. They are not compatible with CPVC, PEX, or push-fit systems without an adapter.
Equal tee or reducing tee — which should I choose?
Choose an equal tee (e.g., Φ16 x 16 x 16mm) when all three branch pipes share the same diameter. Choose a reducing tee (e.g., Φ16 x 12.7 x 12mm) when the branch or run pipe is a different size. Check the variant name carefully: the three dimensions listed correspond to the run inlet, run outlet, and branch outlet diameters respectively.
What solder and flux should I use with these fittings?
Use lead-free solder (typically 95/5 tin-antimony or 97/3 tin-copper) and a water-soluble or no-clean flux rated for copper plumbing. For potable water lines, always use NSF/ANSI 61-certified lead-free solder and flux. Clean the pipe end and fitting socket with emery cloth before applying flux for a reliable joint.
Can I use these for hot water or heating systems?
Yes. Copper end feed fittings are commonly used in hot water supply lines and hydronic heating systems. They are generally rated for continuous service up to 120°C (248°F) when properly installed. Verify the specific temperature limits with your local plumbing code and the solder manufacturer's data sheet.
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