What is the minimum size pipe you are allowed by code to use for a sensing line on a fire pump assembly to the controller?

The minimum size pipe permitted by code for a sensing line on a fire pump assembly to the controller is 1/2 inch. This size ensures that the system can sufficiently sense pressure changes without significant resistance or restriction, which is crucial for the accurate operation of the fire pump. The sensing line is essential for detecting when the system requires activation, and using a pipe diameter that is too small could lead to delays in response time or improper readings, potentially jeopardizing the effectiveness of the fire protection system. Additionally, adhering to code requirements is vital for compliance and safety protocols in fire protection infrastructure.