Plastic Y-Piece 45° 3-Way Barbed Hose Fitting — Tubing Connector for Garden, Aquarium & Irrigation

Match the barb outer diameter (OD) to your tubing's inner diameter (ID). The size format shown is Inlet OD – Branch OD – Outlet OD. For example, "4mm – 4mm – 4mm" fits tubing with approximately 4mm inner diameter on all three ports. When in doubt, measure your tubing ID with calipers before ordering — a barb that's slightly larger than the tubing ID will create a tighter seal, while one that's too small may slip out under pressure.

Quick inch reference: 3.9mm ≈ 5/32", 4.8mm ≈ 3/16", 6mm ≈ 1/4", 8mm ≈ 5/16", 10mm ≈ 3/8".

These fittings are made from rigid engineering-grade plastic — typically polypropylene (PP) or a similar polymer. This material is lightweight, corrosion-resistant, and generally compatible with water, mild fertilizer solutions, and aquarium-safe fluids. It is not recommended for use with strong solvents, concentrated acids, or high-temperature steam lines.

Yes. The plastic construction is generally resistant to moisture and mild UV exposure, making it suitable for garden drip irrigation, outdoor water distribution lines, and greenhouse setups. For installations with prolonged direct sunlight, consider shielding the fitting or using UV-stabilized tubing to extend service life.

Plastic barbed fittings of this type are typically rated for low-pressure applications — generally up to 30–60 PSI depending on tubing material, wall thickness, and operating temperature. They are not suitable for high-pressure hydraulic lines, compressed air systems above typical aquarium/irrigation pressures, or steam applications. If you have specific pressure requirements, contact us to confirm before ordering.

Yes. Barbed fittings are designed to work with flexible tubing including silicone, vinyl (PVC), polyurethane, and similar soft-walled hoses. The barbed profile grips the tubing interior to create a secure, leak-resistant connection without clamps — though hose clamps are recommended for higher-flow or pressurized applications to prevent the tubing from backing off the barb.

The three numbers represent the barb outer diameters of the three ports in order: Inlet – Branch – Outlet. Equal values (e.g., 6mm – 6mm – 6mm) indicate a symmetrical Y-fitting where all three ports accept the same tubing size. Unequal values (e.g., 6.4mm – 3.9mm – 6.4mm) indicate a reducing Y-fitting with a smaller branch port — useful when splitting a main line to a smaller secondary feed.

Yes. These plastic Y-fittings are commonly used in aquarium air line tubing, CO2 diffuser systems, and water circulation setups. The plastic material is generally inert and safe for freshwater aquarium use. Always verify compatibility with your specific tubing and fluid type before installation, particularly for saltwater or reef tank applications.