The Bendix+ SRC-7000 trailer spring brake valve is a reservoir-mounted trailer valve that can control up to six spring brake actuators during parking or emergency applications It has the following capabilities: Automatically applies trailer spring brakes in the event of a breakaway or trailer supply line failure Protects trailer reservoir-s- air pressure in the event of a breakaway or trailer supply line failure Does not allow an automatic trailer spring brake application with air pressure loss in trailer reservoir-s- Allows the trailer spring brakes to be applied and released repeatedly with a failed trailer reservoir-s-: Anti-compounding prevents an overriding service brake signal while the trailer supply line is at atmospheric pressure Does not allow service system charging if a failure occurs in the parking brake circuit Muffler and snorkel capable