What is the purpose of a manual gas shutoff valve installed near a furnace?

• A. Monitors electrical current
• B. Regulates water pressure
• C. To provide a service shutoff and emergency shutoff for gas supply.
• D. Controls air flow

Answer: (C)

The purpose of a manual gas shutoff valve installed near a furnace is to provide a service shutoff and emergency shutoff for the gas supply. Because it’s located close to the appliance, you can quickly stop gas flow to the furnace during maintenance, repair, or if you suspect a gas leak, reducing the risk of a leak spreading. The valve should be easily accessible and placed upstream of the furnace’s gas control valve so the entire appliance can be isolated without affecting other gas lines. It is not used to monitor electrical current, regulate water pressure, or control air flow—those functions belong to other systems and components. If a gas smell or leak is suspected, leave the area and call the gas company or emergency services.