Y-Type 3-Way Barbed Hose Connector — Plastic Tee Fitting for Tube & Pipe

Measure the inner diameter (ID) of your flexible tubing — not the outer diameter. The barb size should match or be very slightly larger than the tube ID for a secure friction fit. For example, a 4mm barb typically fits tubing with a 4mm inner diameter. For stepped variants (e.g., 2.4-3.2-2.4), the three numbers indicate the port diameter at each arm of the Y, so you can join two 2.4mm tubes to one 3.2mm tube in a single fitting. As a general rule: 4mm ≈ 5/32", 6mm ≈ 1/4", 8mm ≈ 5/16", 10mm ≈ 3/8".

These connectors are generally made from durable engineering-grade plastic (typically polypropylene or a similar polymer). This material is lightweight, corrosion-resistant, and compatible with water, mild nutrient solutions, and air — making it well-suited for aquarium, irrigation, and laboratory tubing applications.

Plastic barbed fittings are generally rated for low-to-medium pressure applications. In most cases, they are suitable for gravity-fed or pump-assisted systems operating at pressures typically below 30 PSI. For higher-pressure systems, we recommend using hose clamps over the barbed joints and contacting us to confirm suitability for your specific application.

Yes. The plastic construction is moisture-resistant and corrosion-proof, making these fittings suitable for outdoor drip irrigation, garden watering systems, and aquarium setups. For long-term outdoor installations, consider shielding the fittings from prolonged direct UV exposure, as extended sunlight can degrade some plastics over time.

Yes. These barbed connectors are sized by inner diameter to fit standard flexible tubing commonly used in aquariums, drip irrigation, hydroponics, laboratory equipment, and DIY fluid systems. The range covers 1.6mm through 20mm in single-diameter sizes, plus a wide selection of stepped reducer variants for mixed-diameter connections. Always verify your tubing's ID before ordering.

For low-pressure, gravity-fed, or aquarium applications, the barbed design typically provides a secure friction fit without additional clamps or adhesive. For higher-pressure systems, pump-driven lines, or vibration-prone environments, using hose clamps over the barbed joint is generally recommended to prevent accidental disconnection.

The three numbers represent the barb diameter at each of the three ports of the Y-fitting. For example, 2.4-3.2-2.4 means both side ports accept 2.4mm tubing and the branch port accepts 3.2mm tubing. This allows you to split a larger-diameter line into two smaller lines, or merge two smaller lines into one larger one — all in a single compact fitting without needing a separate reducer.

The 120° Y-Type variant has all three ports arranged at equal 120° angles, creating a symmetrical Y-shape. The Beveled variant typically has one port at a different angle, which can be useful in tight spaces or when routing tubing in a specific direction. Both provide the same three-way connection function — the choice depends on your installation geometry.