Disc Brake Proportioning Valve Tool

This proportioning valve tool is extremely useful when installing a new prop valve. It screws into the top of the proportioning valve where the brake warning light switch would mount. The nub at the end of the tool prevents the pressure differential switch in the prop valve from tripping when you bleed the brakes. Once you have bled the brakes, simply remove the tool and reinsert the brake warning light switch and you are ready to roll.