A supply of at least six spare sprinkler heads must be kept available on the premises near what location?

The requirement to keep a supply of at least six spare sprinkler heads near the main control valve is based on ensuring quick access to critical components of the fire protection system. The main control valve is essential for the operation of the sprinkler system, as it controls water flow to the sprinklers throughout the building.

Having spare sprinkler heads on hand near this location allows for immediate replacement in the event of a malfunction or damage to existing heads during a fire incident. This proactive measure helps maintain the operational integrity of the fire protection system, ensuring that it can effectively respond to a fire emergency without delays that might occur from retrieving spare heads from a more distant location.

In contrast, other locations, such as the fire alarm panel, elevator lobby, or stairwell landing, are not directly related to the operation of the sprinkler system and would not provide the same efficiency or effectiveness in emergency situations. Therefore, keeping spare heads near the main control valve aligns with best practices for fire safety and rapid response in case repairs are necessary.