If a fire has been completely extinguished, who may close the control valve?

The correct response is that the building owner may close the control valve after a fire has been completely extinguished. This is because the control valve is part of the building's fire protection system, and the owner has the rights and responsibilities for the maintenance and operation of their property, including its safety systems. Once it has been confirmed that the fire is out and there is no further risk, the owner is authorized to take actions to restore the property to normal operating conditions.

In situations where a fire has occurred, firefighters typically focus on extinguishing the flames and ensuring the area is safe. Their primary responsibility is fire suppression, and even after the fire is out, they may need to monitor the scene for potential rekindling and ensure that safety protocols are followed before allowing other personnel to take action.

Sprinkler system technicians usually handle the installation, maintenance, and repair of sprinkler systems but are not typically involved in a fire's direct aftermath concerning the control valve unless they are conducting a follow-up inspection or repair.

Insurance adjusters assess damage for claims purposes but do not have the authority to operate control valves or make decisions about the fire protection systems in place. They focus on evaluating the situation from a financial standpoint rather than on operational control or safety.