This permanently affixed glad hand lock is a simple tool to secure unattached and unattended trailers while in yards, drop lots, in transit, on customer sites or in rail yards.  The TS-3A is a simple mechanical air locking valve that can only be deployed when the there is no air in the lines.  Upon disconnecting the trailer the driver turns the key, moving a ball valve in place so that no air can be re-introduced into the lines to raise the brakes.  

The device is plumbed into the air lines and requires a considerable amount of time to circumvent.  Unlike a portable glad hand lock which can be removed along with the fitting, this device cannot be removed without doing damage to the lines, thereby disabling the trailer's brake system.  It is easy to operate, extremely secure and has tremendous deterrent value against theft.  It can be master keyed or uniquely keyed to suit the application.  TS-3A can be quickly installed on most trailers equipped with air brakes, attached to the facing of the trailer or on the undercarriage.

NOTE:  This product is based on the proven TS-4A Tractor Air Brake Lock, a Truck Security Best Practice, and is currently under evaluation by the CSA.