How fast do you get a knockdown on an average fire? Our guest on this show says you should see the effects in 30 seconds. If you don’t, he says, you’re not flowing enough water. Paul Shapiro is a back to talk about overwhelming a fire with massive water. Paul’s been involved with the fire service since 1981. He was an engineer with Las Vegas, Nevada Fire and Rescue for 28 years until he retired. He is a certified fire instructor III for Nevada and has served on the faculty of many fire academies throughout the United States. Paul wrote "Layin’ The Big Lines," a book on large flow water delivery.