Founded in 1916, Dixon Valve & Coupling is a supplier of hose fittings, couplings and accessories for the construction industry. In 1976, the business moved to Chestertown, Md., where it is headquartered. Dixon Valve s proprietary products include Boss couplings, King single and double bolt hose clamps, Air Hammer couplings, suction couplings, Air King Universal couplings and King combination nipples. The company is a division of the Dixon Group that also includes the American Coupling Company, Perfecting Coupling Company, Bradford Fittings, Dixon Bayco and Dixon Fire. Dixon Valve has locations that span the United States and Canada, Mexico, Australia, Germany and England.