What Is the Average Flow Rate of Faucets?

As I was trying to find out about faucet flow rates, I stumbled upon some interesting information. I would like to share with you what I researched.

What is the average flow rate of faucets? The average flow rate of faucets are between 1.0 GPM (Gallons Per Minute) and 1.5 GPM. Studies show that on average people open the faucet to a flow rate between 1.0 GPM and 1.5 GPM. According to Federal Standards, all faucets are subject to a maximum flow rate of 2.2 GPM at 60 psi (Pounds Per Inch).

The maximum flow rate allocated for faucets is 2.2 GPM according to Federal Standards. Nonetheless, the flow rate can be reduced to 0.8 GPM without affecting the water pressure. Furthermore, it would also be significant saving on your water bill.

How to Measure the Faucet Flow Rate?

To measure the flow rate of your faucet you will need a container large enough to hold about one gallon (3.75 Litres) of water, a measuring cup and a stopwatch.

  1. Place the container under the faucet.
  2. Open the faucet and at the same time start the stopwatch timer. It’s important that these two actions be done simultaneously. Note: If the maximum flow rate is what is being measured, then the faucet needs to be open fully. This includes both the hot and cold nobs too if available.
  3. Wait for 10 seconds and turn off the faucet.
  4. Measure the water that is collected in the container. Convert the measured value to gallons and multiply that value by six. This would be the GPM (Gallons Per Minute) of the faucet.

How to Reduce Faucet Flow Rate?

A faucet aerator reduces the flow rate. Faucet aerators are often found at the tip of the fixture. They are generally screwed onto the faucet head. Thus, creating a non-splashing stream of water mixed with air. This method of reducing the flow rate does not affect water pressure.

The U.S. Environmental Protection Agency’s (EPA’s) WaterSense program published a specification. This specification labels water-efficient high-performing faucets and faucet accessories. Furthermore, it certifies to use between 0.8 GPM at 20 psi (Pounds per square inch) and 1.5 GPM at 60 psi. And, 0.5 GPM for public installations.

How to Increase Faucet Flow Rate?

You can increase the faucet flow rate by replacing the faucet aerator with a higher GPM model in most cases. But, before going out and purchasing a new one, it helps to find out if the aerator is the real problem. To check this remove the aerator completely and open the faucet to see if the flow is good. If so, then, the problem is with the aerator.

  • Low flow faucet aerator – If this is the problem, you can simply replace the aerator with a higher flow rate unit or remove it completely. However, find out what the maximum legal flow rate allowed in your area while exploring these options.
  • Plugged aerator screen – Over time, mineral deposits and sediments tend to clog up your faucet head. You can unscrew the tip and clean it with vinegar. Use toothpicks to scrape out the particles. If the deposits are too stubborn to be removed, it may be time to replace the faucet head completely.
  • Check shut-off valves 
  • Faucet supply tube

Did You Know?

  • Studies show that if we closed the faucets while we brush our teeth, we would be saving about 3000 gallons of water each year.
  • Replacing showerheads with WaterSense-labeled models can save 4 gallons of water every time you take a shower.
  • Old, inefficient faucets and aerators replaced with WaterSense-labeled models can save 700 gallons of water per year.
  • Replacing a standard clock timer with a WaterSense-labeled irrigation controller can save your home nearly 8,800 gallons of water.
  • WaterSense-labeled faucets—or aerators that can be installed on existing bathroom faucets—are about 30 percent more efficient than standard faucets while still providing sufficient flow.
  • Homes that earn the WaterSense label feature WaterSense-labeled plumbing fixtures, efficient hot water delivery, smart landscape design, and many other features to ensure that the home will save water for years to come.

People Also Ask

Talking about faucet flow rates here are some frequently asked questions related to faucet water flow rates. I think you’ll find these answer beneficial. So, I thought of including them here.

What is a good flow rate for a bathroom faucet?
A good faucet flow rate is around 1.5 GPM or even 0.5 GPM (according to WaterSense standard).

What is the average flow rate of a bathtub faucet?
The average flow rate of a bathtub faucet is approximately 4 to 7 GPM.

What is the average household water flow rate?
The average American household needs 100 to 120 gallons per person per day and flow rate of 6 to 12 GPM. This can vary depending on the size of the family.

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