With Expertise Built In, the OTR Quick Release Valve with Check offers a superior reduction of brake lag in the air brake system. This OTR quick release valve functions for the emergency side of the spring brakes. Additionally, the double check valve prevents the simultaneous application of the emergency side of the spring brakes. This OTR brake quick release valve meets and exceeds OEM expectations, efficiently releasing air to optimize your air brake system. In the end, this heavy duty quick release valve offers prime brake function with safety in mind. FleetPride is your First Click in Heavy Duty.