At what maximum height above the floor shall a water heater discharge pipe terminate?

• A. 3 inches
• B. 6 inches
• C. 12 inches
• D. 18 inches

Answer: (B)

The correct answer is that a water heater discharge pipe must terminate at a maximum height of 6 inches above the floor. This requirement is in alignment with plumbing codes designed to ensure that if there is a discharge from the water heater, such as in the event of overflow or malfunction, the water will be directed safely and not create a hazardous condition. Terminating the discharge pipe too high could allow hot water or steam to escape directly into the space, posing a scalding or steam hazard. Additionally, having a lower termination height helps to direct any discharged water away from the appliance and towards a safe drainage point, reducing the risk of water damage or injury. Other options provided are either too low or too high, which do not adhere to these safety considerations.