P2 - Commercial Plumbing Inspector -

Leo grunted. “Water hammer is usually a loose valve or a bad shock absorber. But 2:17 AM is specific. What equipment cycles on then?”

He met the facility manager, a nervous woman named Carla, in the basement mechanical room. “The main shut-off is here,” she said, pointing to a massive gate valve. “But the problem isn’t on the prints. The night shift says the pipes sound like someone hitting them with a hammer at 2:17 AM. Every night.” p2 - commercial plumbing inspector

“I need to see the ceiling crawlspace above 3C,” Leo said. Leo grunted