Do I need a washer with these connectors?

Most variants include a nut. Separate washer options are available in the size selector (e.g., Washer-9*4*2mm for M5). Using the matching washer improves sealing and prevents leaks, especially on BSP threaded ports.

Plastic Barbed Hose Reducer Connector — Straight Thread Joiner for Air & Water Tube

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Plastic Barbed Hose Reducer Connector — Straight Thread Joiner for Air & Water Tube

Name: Plastic Barbed Hose Reducer Connector — Straight Thread Joiner for Air & Water Tube
Brand: HomeDIYer
Price: 6.94 USD
Availability: InStock

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By HomeDIYer®

Size: 1.6-M5-1.6mm(With Nut)

Quantity(PCS): 1PCS

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$6.94 USD

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In stock (500 units), ready to be shipped

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Plastic Barbed Hose Reducer Connector — Straight Thread Joiner for Air & Water Lines

When your pneumatic system, irrigation setup, or lab tubing requires a reliable transition between two different hose sizes through a threaded port, a mismatched or leaking fitting can bring your entire workflow to a halt. DIYers, technicians, and small shop operators need a connector that installs quickly, seals consistently, and handles both air and water without fuss.

Each piece in this listing is a straight-through plastic barbed reducer joiner with a center thread. The barb ends are available in sizes ranging from 1.6mm to 20mm (≈1/16" to ≈3/4"), and the center thread covers Metric M5–M16 and BSP G1/8"–G3/4" standards. Variants marked "With Nut" include the locking nut; separate washer options (9×4×2mm up to 40×25.5×3mm) are also available in the size selector. Available in packs of 1, 5, or 10 pieces.

Typical use cases include connecting silicone or PVC tubing in aquarium filtration systems, joining air hose runs in workshop compressor setups, and routing coolant or water lines in DIY CNC or 3D printer builds — all scenarios where a plastic barbed hose reducer joiner with straight thread delivers a clean, tool-free hose connection.

🔗 Compatible with silicone, PVC, polyurethane, and rubber hoses. Thread standards: Metric (M5–M16) and BSP (G1/8"–G3/4"). Confirm your hose ID and port thread before ordering.

✅ Key Features of These Plastic Barbed Hose Reducer Connectors

🔀Reducer Design — Connects two different hose diameters through a single threaded port, eliminating the need for multiple adapters in tight spaces.
🧵Dual Thread Standards — Available in Metric (M5–M16) and BSP (G1/8"–G3/4") threads, covering the most common port standards used in pneumatic and hydraulic fittings.
💧Air & Water Rated — Suitable for low-to-medium pressure air lines, water tubing, and non-aggressive fluid transfer in aquariums, irrigation, and lab setups.
🔩Nut Included — Most variants ship with a locking nut for secure panel or bulkhead mounting; matching washers available separately in the size selector.
⚙️Barbed Grip — The ridged barb profile grips hose inner walls without clamps for typical low-pressure applications, reducing installation time on plastic barbed hose fittings.
📦Flexible Pack Sizes — Order 1, 5, or 10 pieces per size to match project scale, from single repairs to bulk workshop stocking.

📐 Technical Specifications — Plastic Barbed Reducer Hose Connector

Product Type	Straight Thread Barbed Reducer Joiner
Body Material	Plastic (typically nylon or acetal — see variant options)
Thread Standards	Metric M5, M6, M8, M10, M12, M14, M16; BSP G1/8", G1/4", G3/8", G1/2", G3/4"
Barb OD Range	1.6mm (≈1/16") to 20mm (≈3/4") — see variant selector
Connection Type	Straight-through with center thread (reducer or equal bore)
Nut Included	Yes (on variants marked "With Nut")
Washer Options	9×4×2mm (M5), 12×6×3mm (M6), 15×8×3mm (M8), 16×10×3mm (M10/G1/8"), 19×11.5×3mm (M12/G1/4"), 24×15×3mm (M14/M16/G3/8"), 30.5×20×3mm (G1/2"), 40×25.5×3mm (G3/4")
Fluid Compatibility	Air, water, and non-aggressive liquids (generally)
Pressure Rating	Typically up to 6–8 bar (87–116 psi) — contact us to confirm
Pack Quantities	1 PCS, 5 PCS, 10 PCS
Country of Origin	See variant options

⚠️ Size format guide: Barb1 OD – Thread – Barb2 OD. Example: "4-M6-6mm" = 4mm barb on one end, M6 center thread, 6mm barb on the other end. Measure your hose ID and port thread before selecting a variant.

❓ Frequently Asked Questions

How do I choose the right barb size and thread size for my hose?

Match the barb OD to your hose inner diameter (ID). For example, a 6mm barb typically fits a 6mm ID hose. The thread size (e.g., M6, G1/4") must match your fitting port. Measure your hose ID with calipers and check your port thread standard before ordering. Sizes are listed as Barb1-Thread-Barb2 in the variant selector — for instance, "4-M6-6mm" means 4mm (≈5/32") barb, M6 thread, 6mm (≈1/4") barb.

What is the pressure rating of these plastic barbed connectors?

These connectors are generally suitable for low-to-medium pressure applications, typically up to 6–8 bar (87–116 psi) depending on hose material, fluid type, and ambient temperature. For high-pressure or safety-critical systems, contact us to confirm suitability before ordering.

Can these connectors be used outdoors or in wet environments?

The plastic body is generally resistant to moisture and mild corrosion, making it suitable for irrigation and outdoor water lines in most cases. However, prolonged UV exposure or temperatures outside the typical –10°C to 60°C (14°F to 140°F) range may affect performance over time. Inspect periodically in harsh environments.

What thread standards are compatible with these fittings?

These connectors are available in two thread families: Metric (M5, M6, M8, M10, M12, M14, M16) and BSP — British Standard Pipe (G1/8", G1/4", G3/8", G1/2", G3/4"). BSP threads are parallel (BSPP/G-type). Select the variant matching your system's thread type. If unsure, use a thread gauge or contact us.

Do I need a washer, and which one fits my thread size?

Most variants include a nut. A washer is recommended for BSP threaded ports to ensure a leak-free seal. Select the matching washer from the size dropdown: 9×4×2mm for M5, 12×6×3mm for M6, 15×8×3mm for M8, 16×10×3mm for M10/G1/8", 19×11.5×3mm for M12/G1/4", 24×15×3mm for M14/M16/G3/8", 30.5×20×3mm for G1/2", and 40×25.5×3mm for G3/4".

Are these connectors suitable for both air and water lines?

Yes. These plastic barbed hose connectors are generally compatible with compressed air, water, and other non-aggressive fluids. They are commonly used in pneumatic systems, garden irrigation, aquarium filtration, and laboratory tubing setups. Avoid use with solvents, fuels, or aggressive chemicals unless confirmed compatible.

What does the size format like "4-M6-6mm" mean?

The format is: Barb1 OD (mm) – Thread Size – Barb2 OD (mm). "4-M6-6mm" means one end has a 4mm (≈5/32") barb, the center has an M6 thread, and the other end has a 6mm (≈1/4") barb. This reducer design lets you connect two different hose sizes through a single threaded port. Variants showing only "Barb-Thread" (e.g., "3-M5") are equal-bore on both ends.

🛒 Select your size and quantity above, then add to cart — ships from our US warehouse.

Plastic Barbed Hose Reducer Connector — Straight Thread Joiner for Air & Water Tube

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Plastic Barbed Hose Reducer Connector — Straight Thread Joiner for Air & Water Lines

✅ Key Features of These Plastic Barbed Hose Reducer Connectors

📐 Technical Specifications — Plastic Barbed Reducer Hose Connector

❓ Frequently Asked Questions

Plastic Barbed Hose Reducer Connector — Straight Thread Joiner for Air & Water Tube

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