Plastic Barbed T-Piece Hose Connector with Male Thread — 4mm to 20mm Tube

Measure the outer diameter (OD) of your hose or tube — available sizes are 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, and 20mm. Then match the thread size to your fitting port: 1/8" (≈3.2mm bore), 1/4" (≈6.4mm), 3/8" (≈9.5mm), or 3/4" (≈19mm). When in doubt, measure the female port OD and compare to a standard NPT/BSP thread chart. For example, a 6mm tube with a 1/4" threaded port is a common combination in drip irrigation systems.

Plastic barbed T-piece fittings of this type generally handle low-to-medium pressure — typically up to 60–100 PSI depending on tube wall thickness and fluid temperature. They are well suited for gravity-fed irrigation, aquarium systems, and low-pressure compressed air lines. They are not recommended for high-pressure hydraulic systems. Contact us to confirm suitability for your specific application.

Yes. These fittings are generally made from polypropylene (PP) or similar engineering-grade plastic that resists moisture and mild UV exposure, making them suitable for outdoor garden irrigation and pond plumbing. For prolonged exposure to direct sunlight, consider adding UV-protective sleeving over the connected hose. They are not suitable for saltwater immersion or chemically aggressive fluids without prior confirmation.

The thread sizes listed (1/8", 1/4", 3/8", 3/4") are compatible with both NPT and BSP standards in most low-pressure applications, as the thread pitch is similar at these sizes. For critical sealing applications, verify the thread standard of your mating port. PTFE tape is recommended on all threaded connections regardless of standard.

Push the hose firmly over the barbed end until it seats past the barb ridge. For a secure, leak-free connection — especially in pressurized systems — use a hose clamp or zip tie over the barbed section. The barb design generally holds the hose in place under normal low-pressure flow conditions without additional fastening, but clamping is always recommended for reliability.

These connectors are well suited for: drip irrigation line branching, garden watering systems, aquarium and pond plumbing, air line splits in workshops, fuel line branching in small engines, and general DIY fluid routing. They are not intended for drinking water (potable) systems unless the material is confirmed food-safe for your jurisdiction.

Yes — applying PTFE (Teflon) tape to the male threads before installation is strongly recommended. Wrap 2–3 layers clockwise around the threads to ensure a watertight seal and prevent cross-threading. Do not overtighten plastic fittings — hand-tight plus a quarter turn is generally sufficient to avoid cracking the fitting body.

Barbed fittings are designed for use with flexible tubing (such as silicone, PVC, polyurethane, or rubber hose). They are not suitable for rigid pipe. The tube must be flexible enough to stretch slightly over the barb for a secure grip. If you need to connect rigid pipe, a compression or push-to-connect fitting would be more appropriate.