The overflow pipe from an elevated tank should be brought down from the maximum tank level to about how many feet off the ground surface?

• A. 2 ft
• B. 6 ft
• C. 1 ft
• D. 4 ft

Answer: (A)

Placing the overflow discharge about two feet above the ground provides a practical balance for safe drainage and maintenance. This height creates a small vertical separation, which helps reduce the chance of backflow or splashback contaminating the storage system, and makes the overflow easy to see and inspect during routine checks. It directs the water away from the tank foundation and minimizes pooling around the base. Heights much higher would be unnecessary and could spread the overflow farther; too close to the ground (like one foot) increases splash and puddling and can lead to icing or contamination concerns. So about two feet off the ground is the standard that works well in practice.