Founded in 1999, State Line Propane is a locally owned company that offers bulk delivery and equipment sales and installation services. Its full-time technicians service and convert a variety of appliances, such as cook stoves, dryers, water heaters, gas fireplaces and logs. The company serves clients in the states of Connecticut and Massachusetts. In addition, State Line Propane operates a showroom that provides various propane products. It offers products from American Welding & Tank, Rinnai America Corporation and White Mountain Hearth. The company serves commercial and residential accounts and offers delivery options.