(a) Chimneys, flues or similar devices for conveying products of combustion or hot gases to the exterior of the building shall be maintained in a manner so as not to create a hazardous condition.
(1) Existing masonry chimneys which, upon inspection, are found to be without the flue liner and with open mortar joints which will permit smoke or gases to be discharged into the building, or which are cracked as to be dangerous shall he made safe by means of a fire clay liner, fire brick, a corrosion resistant metal pipe and otherwise repaired if necessary, or the chimney shall be removed. Metal pipe liners shall be one inch less in diameter than the least dimension of the flue and entire space between the metal liner and the walls of the chimney filled with cement mortar.
(2) Existing chimneys and vents of metal which are corroded or improperly supported shall be replaced, unless suitable repairs are made.
(3) Existing chimney and vent connectors of metal which are corroded or improperly supported shall be replaced.
(b) All heat producing appliances, including boilers, furnaces, incinerators, ovens and restaurant type cooking appliances shall be installed and maintained in an approved manner.
(c) Exhaust systems provided for restaurant cooking equipment shall be maintained in a manner such as not to create a hazardous condition.
(1) Hoods, grease removal devices, fans, ducts and other devices shall be inspected periodically and cleaned as needed to remove grease and deposits of residues.
(2) Fire extinguishing systems shall be inspected periodically and checked for proper operation. These inspections shall include a check that the supply of extinguishing agent in the system is adequate, and all actuation components are operating satisfactorily. Fusible links, if employed, shall be replaced or properly cleaned. Instructions for manually operating the system shall be posted conspicuously in the kitchen and employees checked for their knowledge of procedures.
(3) Any fire dampers shall be tested periodically to insure proper functioning of all parts.
(d) Commercial, industrial and flue-fed incinerators shall be provided with approved spark arresters or other effective means for arresting sparks and fly ash.
(1973 Code §9-7)