What type of fittings may be included in the appurtenances of fire service mains?

The inclusion of tees, elbows, couplings, and specialized fittings in the appurtenances of fire service mains is essential due to their roles in ensuring the effective distribution and management of water flow within the fire protection system. Tees and elbows allow for changes in direction of the water supply, while couplings are critical for joining sections of pipe together. Specialized fittings can facilitate connections to various components of the fire service mains, supporting the overall hydraulic performance and ensuring that the system functions correctly during an emergency. Each type of fitting plays a vital role in creating a reliable and efficient network for delivering water to fire protection systems, aligning with the requirements set forth in NFPA 24.