Air Brake Valves

All Pro Truck Parts carries air brake valves for heavy-duty trucks, trailers, and commercial vehicles. Our inventory includes both OEM and aftermarket replacement valves — relay valves, quick-release valves, spring brake modulators, tractor protection valves, double-check valves, and more — covering a wide range of makes and models.

We stock valves from manufacturers like PAI Industries, Predator HD Parts, World American, and Power Products International, along with OEM options from Bendix, Haldex, and Midland. Whether you need an exact OE replacement or a cost-effective aftermarket alternative, every valve we sell is a direct-fit part with the correct port sizes and mounting dimensions.

Use the categories below to narrow your search by valve type. Need help finding the right part number? Visit our help center for cross-reference assistance.