Haldex Air Brake Reservoir Drain Valve

Haldex Air Brake Reservoir Drain Valves: Engineered for Heavy-Duty Reliability

When moisture and contaminants accumulate in air brake reservoirs, brake performance suffers — and in a commercial vehicle, that's a serious safety concern. Air brake reservoir drain valves are the unsung workhorses that expel water and debris from wet and dry tanks, protecting downstream brake components from corrosion and freeze-up. Few names carry more weight in this space than Haldex.

A Legacy Built on Brake System Expertise

Haldex is a Sweden-based manufacturer with roots stretching back to 1887. Haldex is a leading global supplier of sustainable brake systems and air suspension solutions dedicated to the commercial vehicle industry, with over 130 years of innovation providing competitive expertise in brake and air suspension systems for commercial vehicles. The air controls product range was added in 1998 with the acquisition of Midland Grau , bringing deep air-system engineering know-how directly into the Haldex portfolio — including the valves and reservoir components that keep air brake systems clean and functional.

Haldex Drain Valve Options: Manual and Automatic

Haldex offers drain valves in configurations designed to match the specific demands of different commercial vehicle applications. Their lineup spans both manual cable-pull models and fully automatic versions:

• Manual Cable-Pull Drain Valves: Manual wet or dry tank drain valves allow complete draining of reservoirs. Haldex manual valves are available with various cable lengths — commonly 24-inch, 36-inch, and 60-inch — giving technicians or drivers convenient reach to the drain point from outside the vehicle.
• Automatic Drain Valves: Haldex automatic drain valves are designed for air brake drain valve applications in reservoir drains, mounting effortlessly into the bottom drain port of the reservoir with only one moving part — a design that minimizes failure points and simplifies maintenance.
• Heated Variants: Haldex drain valves are available heated (12 volt, 5 AMP) and non-heated, mounting to the side or bottom of the wet tank and functioning when pressure varies in the air tank. Heated models are particularly valuable for fleets operating in cold climates where condensation freeze-up is a concern.

Built to OEM Quality Standards

What sets Haldex apart in the drain valve category is its commitment to factory-equivalent fit and function. The Haldex automatic drain valve is a premium-quality replacement for old or damaged drain valves — part of the Haldex comprehensive valve line, manufactured with top-quality components, precise processes, and exacting quality standards to ensure it fits and works just like the genuine valve. This matters when servicing vehicles that originally came equipped with Haldex or Midland air systems, where cross-compatibility and dimensional accuracy are critical.

Haldex offers air control products such as compressed air dryers, valves, ABS, and EBS — all designed with safety and efficient operation in mind, cutting down on potential hazards and maintenance costs in the long run. Drain valves sit at the foundation of this philosophy: a properly functioning drain valve is one of the simplest and most cost-effective ways to extend the service life of an entire air brake system.

Who These Valves Are For

Haldex drain valves are engineered for heavy-duty commercial vehicles — Class 6 through Class 8 trucks, semi-trailers, and buses — where air brake systems are standard equipment. Fleet maintenance managers, owner-operators, and independent repair shops alike rely on Haldex components to keep vehicles compliant with federal air brake safety standards and out of the shop between service intervals.

Browse the full selection of Haldex air brake reservoir drain valves above, or explore the complete Haldex brand catalog for brake adjusters, spring brakes, air dryers, and more.