Working plans for dry systems are required to include the total system volume, as this information is critical for determining the amount of air or nitrogen needed to pressurize the system and for calculating the time to water delivery. This requirement helps ensure the system's effective operation and quick response in the event of a fire.

Black or galvanized steel piping is acceptable for the suction and discharge piping of pressure maintenance (jockey) pumps in fire protection systems. These materials offer the necessary strength and durability for such applications.

The minimum temperature rating for ceiling sprinklers in roll paper storage areas that are 15 ft or less in height is typically 150F (66C). This rating is selected to provide a buffer between the ambient temperature conditions and the activation temperature of the sprinklers, preventing accidental activation.

Using the Hazen-Williams formula, the friction loss in 150 feet of 1-inch black steel schedule 40 pipe flowing 30 gpm in a wet system would be approximately 27.5 psi. This calculation considers the pipe's material, size, length, and flow rate.

The minimum flow rate for the forward flow test of a backflow prevention assembly should be the system demand plus hose stream allowance, where applicable, to ensure the assembly can handle the maximum expected flow during a fire event.