S.C. Code Ann. § 15-3-690

(A) As used in this subsection, the following definitions apply: (1) "System" or "systems" means assembly of equipment consisting of the container and any device that is connected to the container for the utilization of liquefied petroleum gas. (2) "Dealer" means a person engaging in the installation of liquefied petroleum gas systems or in the manufacture, distribution, sale, storing, or transporting by tank truck, tank trailer, or container of liquefied petroleum gases or engaging in installing, servicing, repairing, adjusting, disconnecting, or connecting appliances to liquefied petroleum gas systems and containers. (3) "Liquefied petroleum gas" means material composed predominately of hydrocarbons or mixtures of hydrocarbons, including propane, propylene, butanes (normal butane or isobutane), and butylenes. (B) A liquefied petroleum gas dealer shall be immune from civil liability if the proximate cause of the injury or damage was: (1) an alteration, modification, or repair of the liquefied petroleum gas system or gas burning appliance that could not have been discovered by the liquefied petroleum gas dealer in the exercise of reasonable care; or (2) the use of the liquefied petroleum gas system or gas burning appliance in a manner or for a purpose other than that for which the liquid petroleum gas system or gas burning appliance was intended to be used or for which could reasonably have been foreseen, provided that the liquefied petroleum gas dealer or the manufacturer of the liquefied petroleum gas system or gas burning appliance took reasonable steps to warn the ultimate consumer of the hazards associated with foreseeable misuses of the liquefied petroleum gas system or gas burning appliance. (C) Nothing in this subsection shall be construed as affecting, modifying, or eliminating the liability of a manufacturer of the liquefied petroleum gas system or gas burning appliance, or its employees or agents from any other legal claim, including, but not limited to, product liability claims. (D) Nothing in this subsection shall apply to a cylinder exchange company as defined pursuant to Section 40-82-20(3) or a reseller as defined pursuant to Section 40-82-20(7).