What is the formula for calculating gallons of water in a pipe?

The formula for calculating gallons of water in a pipe is derived from the volume of a cylinder, taking into account the specific properties of water and the dimensions of the pipe. The correct answer involves a multiplication factor and utilizes the diameter squared (to account for the circular cross-section of the pipe), as well as the length of the pipe.

In this case, the formula B, which states 2.04 x Diameter² x Length / 50, correctly incorporates the necessary conversion factors. The 2.04 is used to represent the volume of water in gallons per cubic foot, and dividing by 50 adjusts the calculation to reflect the specific geometry and measurement system utilized for standard plumbing calculations.

This approach allows for an accurate estimation of how much water can flow through a pipe based on its physical dimensions, allowing for effective planning and management within fire alarm systems where water supply is critical. Understanding this formula is essential for anyone involved in the design or maintenance of fire protection systems, as proper water flow calculations directly impact system effectiveness.