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(888) 312-8812 Login SignupPull-cord operation sets the Hadley Lanyard Valve apart, letting the driver sound a quad air horn with a simple tug on a lanyard. The valve opens the air supply to the horns when pulled and closes it on release, giving the driver direct control of the blast. Because the Hadley H15688 is built for quad horn setups, it delivers enough air to sound all four trumpets together. A responsive pull gives drivers instant control over warning blasts at crossings and job sites.
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