If there are other units present, where should the solenoid valve be placed when converting to an exhaust hood?

If there are other units present, where should the solenoid valve be placed when converting to an exhaust hood?

• A. After all fixtures
• B. Upstream of all fixtures
• C. At the meter
• D. In the exhaust duct

Answer: (B)

Install the solenoid valve upstream of all fixtures on the gas supply line to the hood and any other connected appliances. Placing it before every branch ensures that when the valve is actuated, gas to the entire line is shut off, isolating all units connected on that run. This provides a safe, coordinated shutoff and aligns with typical code practice for controlling gas supply to multiple appliances. Putting the valve after some fixtures would still leave gas flowing to other units, which defeats the safety purpose. Placing a valve at the meter or in the exhaust duct is not appropriate for controlling the appliance gas supply and is not how a dedicated shutoff is intended to operate.

Install the solenoid valve upstream of all fixtures on the gas supply line to the hood and any other connected appliances. Placing it before every branch ensures that when the valve is actuated, gas to the entire line is shut off, isolating all units connected on that run. This provides a safe, coordinated shutoff and aligns with typical code practice for controlling gas supply to multiple appliances.

Putting the valve after some fixtures would still leave gas flowing to other units, which defeats the safety purpose. Placing a valve at the meter or in the exhaust duct is not appropriate for controlling the appliance gas supply and is not how a dedicated shutoff is intended to operate.