Morrison Supply Co., the fourth-largest distributor of plumbing and HVAC supplies in the United States, has sold a majority share to private equity firm Advent International.

Founded in 1917, Morrison is now the largest distributor of plumbing supplies in the southwestern United States. The company has 77 branches and showrooms, located in Texas, New Mexico, Oklahoma, Louisiana, Arkansas and Kansas. Morrison has several lines of business, including plumbing, heating, ventilation & air conditioning (HVAC), industrial pipes, valves & fittings, oil & gas and waterworks.