**The equation for pipe diameter is the square root of 4 times the flow rate divided by pi times velocity. For example, given a flow rate of 1,000 inches per second and a velocity of 40 cubic inches per second, the diameter would be the square root of 1000 times 4 divided by 3.14 times 40 or 5.64 inches.**

## How to Calculate Pipe Size?

Pipe size is an important factor when it comes to installing and maintaining any plumbing system. Knowing how to calculate pipe size is essential for any plumber or DIY enthusiast, as it will help them determine the size and type of pipe needed for their project.

In this article, we’ll explain what pipe size is and how to calculate it. Pipe size is determined by two factors: the size of the pipe itself and the amount of water that can pass through it.

Pipe size is expressed as the inner diameter (ID) of the pipe in inches. The larger the ID, the more water that can pass through it.

To calculate the size of a pipe, you need to know the ID and the flow rate of the liquid you’re trying to move. To calculate the pipe size, start by measuring the ID of the pipe.

You can do this by using a ruler or measuring tape. Then, measure the flow rate in gallons per minute (GPM) or liters per minute (LPM).

To do this, you will need to know the pressure of the water supply, the temperature of the water, and the diameter of the pipe. Once you have the ID and the flow rate, you can use

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