Japtend DOT air line tee fittings 3/8-inch x 3/8-inch x 1/4-inch 3-pack — DOT-approved, push-to-connect

Japtend 3/8" DOT air line tee fittings are quick-connect, DOT-approved nylon/PTC composite tees designed to join 3/8" OD and 1/4" OD air brake or pneumatic tubing safely and reliably.

These three-piece tee fittings let you split or branch compressed-air lines for truck and trailer brake systems, air suspension, tire inflation lines, and other mobile pneumatic circuits. Built to meet DOT FMVSS 571.106 and SAE J2494-3 standards, the fittings accept SAE J844 Type A or Type B nylon tubing and offer push-to-connect convenience plus rotational freedom at the joint.

How do these tees simplify installation and maintenance?

Push-to-connect design eliminates clamps and ferrules for fast, tool-free assembly—just insert tubing until it seats and press the release collar to remove it. The disassembly button gives safe, repeatable servicing without cutting lines. Because the joint can rotate 360°, routing and alignment become easier during installation.

• Push-in connection for quick assembly and disassembly
• Release collar and disassembly button for tool-free service
• 360° rotational joint to reduce stress and misalignment

Are these fittings compatible with my vehicle's air brake tubing?

Yes—these tees are sized for 3/8" OD x 3/8" OD x 1/4" OD tubing and are intended for SAE J844 Type A or Type B nylon brake pipes. They are DOT-approved for use in applications subject to FMVSS and SAE regulations, which helps ensure fit and function in truck, trailer, and heavy-equipment systems.

• Fits 3/8" OD and 1/4" OD nylon tubing (SAE J844 Type A/B)
• Meets FMVSS 571.106 and SAE J2494-3 standards for air hose fittings
• Designed for truck/trailer brake, suspension and pneumatic lines

How durable are the Japtend DOT tee fittings in harsh conditions?

Constructed from PTC/PTCR composite with brass components, these tees resist corrosion and minimize seal wear for prolonged service life. They are rated to operate across a wide temperature range and handle pressures common in vehicle air systems, providing dependable performance in cold, heat, and under load.

• PTC/PTCR composite body with brass elements for corrosion resistance
• Operating temperature: -40°F to +200°F (-40°C to +93.3°C)
• Pressure rating up to 250 PSI (17.2 bar)

Where are these fittings most useful and what problems do they solve?

These tee fittings are ideal where a reliable, fast branch is needed in pneumatic networks—especially on trucks and trailers. They cut installation time, reduce leak points compared with threaded joints, and simplify routine maintenance or component swaps without cutting or re-crimping tubing.

• Use in air brake systems, cab controls, and air suspension lines
• Useful for tire inflation systems and main/secondary air pipelines
• Good for mobile machinery and towed equipment air lines

Who is this for: Professional mechanics, fleet maintenance teams, and DIY truck owners who need DOT-compliant, quick-connect branching for pneumatic systems will appreciate these Japtend tees. They suit anyone looking to reduce installation time, limit leak risk at connections, and maintain reliable air flow in heavy-duty vehicle systems. Each order includes three tested fittings and Japtend customer support for troubleshooting or replacement questions.