Section 27-966. Protection of sprinkler system

(a) All parts of an automatic
  system exposed to freezing temperatures shall be protected from freezing
  in  accordance with the provisions of section 27-949 of article three of
  this subchapter, or in lieu thereof, an automatic drypipe  system  or  a
  system filled with a nonfreezing, noncombustible solution shall be used,
  and  when  a  system  filled  with  nonfreezing solution is used and the
  system is connected to a potable water supply, it shall  be  subject  to
  the requirements of the health department and the bureau of water supply
  of the department of environmental protection.
    (b) Sprinkler heads subject to damage shall be protected in accordance
  with  the applicable provisions of reference standard RS 17-2, RS 17-2A,
  or RS 17-2B.