Founded in 1861 in Washington, D.C., Thos. Somerville was originally a brass and foundry known as National Brass Works. Today, Thos. Somerville distributes a range of plumbing, heating and air conditioning supplies and solutions throughout the Mid-Atlantic United States. The company has its headquarters in Upper Marlboro, Md. and has more than 20 branches, showrooms and a central distribution center. Thos. Somerville is a family-owned company. The company s product line includes Basco shower doors, Crane Plumbing fixtures, Delta faucets, General humidifiers, Honeywell thermostats, Jacuzzi whirlpools, Lenox tools and Sioux Chief plumbing products.