Final answer:
A master plumber with an S-12 Certificate of Fitness can maintain residential sprinkler systems with fewer than 30 sprinklers, following local building and fire safety codes.
Step-by-step explanation:
A master plumber with an S-12 Certificate of Fitness (COF) is allowed to perform maintenance on sprinkler systems in residential occupancies with less than 30 sprinklers. This is regulated by local building codes and fire safety standards. Only a qualified individual with the proper certification, such as the S-12 COF, can legally perform such work. It's imperative to adhere to these regulations to ensure the safety and efficacy of fire suppression systems.
A Master Plumber with an S-12 Certificate of Fitness (COF) is allowed to perform maintenance on sprinkler systems in residential occupancies with less than 20 sprinklers. A COF is a credential issued by the Fire Department of New York (FDNY) that grants individuals the authorization to work on certain types of equipment or systems.