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The MIDLAND INDUSTRIES 290PPCDOT-4 is a D.O.T.-rated plug-in wye fitting designed for use in compressed air and pneumatic tubing systems that require reliable, tool-free branch connections. The fitting splits a single line into two outlets, all three ports accepting 1/4-inch push-to-connect tubing. Built with a composite body, it meets D.O.T. standards and is rated to 145 psi. At 0.029 pounds, it is a compact, lightweight component suited for routing air lines in vehicle, fleet, and trailer air brake or pneumatic control circuits. Licensed technicians working on air systems or fluid power installations are the primary installers.
This fitting is used where a single 1/4-inch air or pneumatic line must be branched into two separate 1/4-inch lines. Common applications include trailer air systems, compressed air plumbing, and fleet vehicle pneumatic circuits where D.O.T.-compliant fittings are required. The push-to-connect design on all three ports allows fast, secure connections without the need for thread sealant, wrenches, or special tooling, making it well suited for tight installation spaces and quick-service environments.
Designed as a D.O.T.-compliant push-to-connect wye fitting for 1/4-inch composite body pneumatic tubing systems, including compressed air and vehicle air brake plumbing applications requiring D.O.T.-rated components.
Installation is typically performed by pneumatic system technicians or licensed brake system mechanics working on D.O.T.-regulated air circuits. Depressurize and drain the air system fully before removing or installing any fittings. Verify tubing is cut cleanly and squarely and inserted to full depth in each port to ensure a proper seal. Follow all applicable D.O.T. regulations and vehicle manufacturer guidelines for air brake and pneumatic system service.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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