Garden Hose Flow Rate How Many Gallons Per Hour

We've all heard the classic summertime question: How many gallons per hour is a garden hose? It's a query that requires a bit of exploration. Let's dive into the details to gain an understanding of how much water is pushed through a garden hose.

What Affects Gallons Per Hour (GPH) in a Garden Hose?

First and foremost, there are a few variables that come together to make up the gallons per hour in a garden hose.

Length and Diameter

Obviously, the length and diameter of the hose play a major role. Generally, longer, bigger diameter hoses are better for pumping larger amounts of water.

Pressure

Pressure, measured in pounds per square inch (psi), is another major component. Pressure is the measure of force needed to push water through the hose. This is a common metric for rating garden hoses, and the more psi needed, the slower the GPH.

Valves

Valves can limit or increase the GPH. Valves that are employed for controlling or regulating the flow of water, like water reducing valves (WRV) or flow control valves, can reduce the GPH. Conversely, if valves are replaced to increase the flow of water, GPH can be increased.

Garden Hose Accessories

The additional accessories that are attached to a garden hose can also affect GPH. Different nozzles and attachments, like pressure washers, sprinklers, and even water guns can all change the GPH.

How Many GPH Does a Garden Hose Carry?

Generally speaking, a standard garden hose without any additional accessories attached can carry water at a rate of anywhere from 5 to 12 GPH. Depending on the diameter of the hose, the amount of pressure and the water flow regulation valves that are in place, this rate can vary. A garden hose with a inch diameter can flow at 5 to 8 GPH. On the other hand, a 5/8 inch diameter hose can flow at 12 GPH or more.

In Summary

The GPH of a garden hose largely depends on the length and diameter of the hose, as well as, the additional accessories, the pressure of the water, and the valves that are used to regulate the water flow. The standard garden hose can run anywhere from 5 to 12 GPH, depending on these variables. Consider these factors when selecting supplies for your outdoor watering jobs and projects.

For additional help in understanding GPH, you may want to read How the Length of a Garden Hose Affects Water Pressure, by Gardening Know-How for further insight.

That wraps up our overview of the GPH of a garden hose. Armed with this knowledge, you should now have a better understanding of how many gallons per hour is a garden hose.