Is it acceptable for a gas dryer to vent into a water reservoir?

• A. Yes
• B. Only if approved by inspector
• C. Only if there is a water trap
• D. No

Answer: (D)

Gas dryers must vent the exhausted air to the outdoors through a proper vent duct. Venting into a water reservoir does not provide a real exhaust path and can cause dangerous conditions: combustion byproducts, including moisture and potentially carbon monoxide, can back up into the living space; the reservoir can overflow or clog, leading to mold, corrosion, or blocked airflow. A water trap or any inspector’s approval does not change the safety requirement that the vent must terminate outside. So, the correct conclusion is that this setup is not acceptable.