Questions are being raised about the role of emergency shutoff valves in preventing natural gas explosions like the recent one at a Kansas City restaurant.
Regulations require their installation, but not their use in emergencies. Instead of shutting valves before a February blast leveled JJ's restaurant and killed a server, crews waited for a backhoe to arrive in a failed attempt to vent the leak.
One experts likened shutoff valves to the brakes on a car.