A water closet with a flushometer water line is what size?

A water closet with a flushometer water line is what size?

• A. 1/2 inch
• B. 1 inch
• C. 3/4 inch
• D. 1 1/4 inch

Answer: (B)

When a water closet uses a flushometer, it needs a ready supply of water to deliver a rapid, high-volume flush. The flushometer valve inlet is designed for a 1-inch connection, so the feeding line is sized to 1 inch to minimize pressure loss and ensure the valve can operate properly. Smaller lines, like 1/2 inch or 3/4 inch, would restrict flow and lead to weak or unreliable flushing. A 1 1/4 inch line is larger than typical for a single fixture and isn’t necessary for standard installations. So, the standard size for a flushometer water line feeding a water closet is 1 inch.

When a water closet uses a flushometer, it needs a ready supply of water to deliver a rapid, high-volume flush. The flushometer valve inlet is designed for a 1-inch connection, so the feeding line is sized to 1 inch to minimize pressure loss and ensure the valve can operate properly. Smaller lines, like 1/2 inch or 3/4 inch, would restrict flow and lead to weak or unreliable flushing. A 1 1/4 inch line is larger than typical for a single fixture and isn’t necessary for standard installations. So, the standard size for a flushometer water line feeding a water closet is 1 inch.