When inspecting a wet pipe sprinkler system, the static pressure above the clapper should be:

In a wet pipe sprinkler system, the role of the clapper is essential for controlling water flow between the supply side and the sprinkler system. The static pressure above the clapper should be equal to or greater than the pressure below the clapper. This ensures that the clapper remains in a position that allows for proper operation of the sprinkler system.

When the pressure above the clapper is equal to or exceeds the pressure below, it ensures that any water flowing from the system does so under adequate pressure to effectively discharge through the sprinkler heads during a fire event. This configuration is crucial for ensuring that the sprinklers can respond immediately when required, providing adequate coverage and suppression capabilities.

If the pressure above the clapper were to be lower than the pressure below it (instead of equal or greater), it could result in improper clapper operation and potentially prevent the system from functioning as intended during an emergency. Therefore, maintaining this pressure balance is vital for the reliability and effectiveness of the fire suppression system.