It has been determined that 537 gallons of water are required at the end of the main of a wet pipe sprinkler system in the design area. The alarm valve is located 85 feet horizontally away from the point of interest in the design area. Assume there are no fittings or elbows to consider. How much pressure is lost to friction in the horizontal piece of pipe if water flows at 537 gpm through the 3-inch Schedule 40 steel pipe main in this wet pipe system?
a. 14.5 psi
b. 20.6 psi
c. 25.1 psi
d. 32.2 psi