Carrie Drier holds up the latest fire sprinkler head made by Viking at the PCBC home show at the Moscone Center in San Francisco on June 25, 2014. (Gary
Carrie Drier holds up the latest fire sprinkler head made by Viking at the PCBC home show at the Moscone Center in San Francisco on June 25, 2014. (Gary Reyes/Bay Area News Group)