What is the approximate weight of one cubic foot of water?

• A. 50 lbs.
• B. 55 lbs.
• C. 62.4 lbs.
• D. 70 lbs.

Answer: (C)

The approximate weight of one cubic foot of water is about 62.4 pounds. This value is derived from the density of water, which is approximately 62.4 pounds per cubic foot at standard temperature and pressure conditions. Understanding this weight is essential for plumbing practice, as it aids in calculations related to pipe sizing, water treatment systems, and various plumbing fixtures.

Other values presented, while close, do not accurately reflect the weight of water per cubic foot when considering standard conditions. Each of these figures may arise in different contexts or under varying conditions, such as temperature changes or salinity in water, but for general plumbing calculations, 62.4 pounds is the industry standard to remember.