What is the pump pressure for supplying the sprinkler system for a building with smoke or fire showing?

The pump pressure for supplying the sprinkler system in a building showing smoke or fire is typically set at 150 psi. This level of pressure is necessary to ensure that the sprinkler system operates effectively and can deliver water adequately to control or extinguish the fire. The pressure needed may vary based on the specific design and requirements of the sprinkler system as well as the building's height and layout, but generally, 150 psi is a standard value used to ensure optimal performance in emergency situations.

By maintaining this pressure, you provide the necessary force for the water to reach the greater heights and furthest distances required by the system, especially in larger structures where effective coverage over a wide area is essential for safety and fire control. Lower pressure might not sufficiently operate the sprinkler heads, leading to ineffective fire suppression.