How to calculate gpm from psi for water

What does GPM mean và why is it important to your daily shower? Believe it or not, it"s the law! Your shower head is covered by federal và possibly local regulations.

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What is GPM?

GPM means Gallons Per Minute. Also known as "flow rate", GPM is a measure of how many gallons of water flow out of your shower head each minute.

Since 1992, a maximum of 2.5 GPM is the federally mandated flow rate for new shower heads. This means no more than 2.5 gallons of water should flow out each minute.

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The GPM flow rate for shower heads has decreased over time. If your current shower head was made in the 1980"s or 1990"s, its flow rate could be 3.5 GPM or more!


Why is shower head GPM or flow rate important?

Federal, state, and local governments regulate shower head GPM flow rates, because the potential for water & energy savings are significant.

A standard 2.5 GPM shower head uses 2.5 gallons of water each minute. That"s 25 gallons for a 10-minute shower.
A low-flow 1.8 GPM shower head uses 1.8 gallons of water each minute. That"s only 18 gallons for a 10-minute shower.

According lớn the EPA showering is one of the leading ways we use water in the trang chủ, accounting for nearly 17 percent of residential indoor water use - for the average family, that adds up khổng lồ nearly 40 gallons per day. That"s nearly 1.2 trillion gallons of water used in the United States annually just for showering, or enough lớn supply the water needs of Thành Phố New York and New Jersey for a year!

How bởi local governments regulate shower heads?

To conserve resources and save sầu money, some state và local governments mandate even lower GPM flow rates than the federal regulation.

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Examples of national và local regulations include:

Thành Phố New York City and the state of Colorado require a maximum of 2.0 GPM California, Washington, and Hawaii require a maximum of 1.8 GPM

In addition, many communities offer incentives & rebates to residents who voluntarily install low-flow shower heads.

Where can I find affordable, high-performance low-flow shower heads?


You are probably thinking that a lower GPM shower head translates into lớn a less satisfying shower. The good news is that shower head design can overcome GPM flow rate limits.

Chuyên mục: Tin Tức