This chapter shall not apply to:
(1) The installation, maintenance, repair, or renovation of fire protection sprinkler systems and related mechanical appurtenances beginning at a point where the pipe or piping system provides water used exclusively for these automatic sprinklers and their related appurtenances and to standpipes connected to automatic sprinkler systems;
(2) The construction, installation, maintenance, repair, renovation, or removal of pipe or piping systems and related mechanical appurtenances, appliances, or equipment used in connection with boilers or related pressure piping as defined in § 20-23-101, commercial or residential swimming pools, or irrigation sprinkler systems from a point or location in a source of potable water supply at which point or location there exists any approved backflow preventor;
(3) Piping, fixtures, appurtenances, and appliances for and in connection with liquefied petroleum gas systems as defined in § 15-75-102; or
(4)
(A) The minimum number or location of plumbing fixtures or toilet facilities for use by the public within buildings, offices, or facilities maintained by banks, savings and loan associations, or credit unions for the conduct of their business.
(B) This exemption applies to any existing or future plumbing codes or rules promulgated by the State Board of Health, or its successor agency.
(C) No municipality or county shall pass or enforce any code or regulation regarding the minimum number or location of plumbing fixtures or toilet facilities for use by the public within buildings, offices, or facilities maintained by banks, savings and loan associations, or credit unions.