If you are considering a kitchen faucet with a flow rate of 1.8 GPM, you might be wondering, “Is 1.8 GPM good for a kitchen faucet?” Well, let’s dive into this topic and explore the merits of this flow rate.

In a nutshell, it can be said that a water flow rate of 1.8 GPM is good for all kitchen faucets. It offers a steady stream of water that allows you to tackle everyday tasks like washing dishes and filling pots with ease. It can be an excellent option for your kitchen if you want to balance water efficiency and practicality.

To learn more about the water flow rate, other standards for flow rates, and local regulations, keep reading. I will delve deeper to uncover how a 1.8 GPM kitchen faucet can bring convenience and eco-friendliness to your culinary haven.

What Is A Flow Rate?

A flow rate is a measurement of the volume used to describe the rate at which fluid moves through a pipe, valve, or other component in a plumbing system.

Flow rate is an important consideration in plumbing design and maintenance. It can affect the performance and efficiency of the system, as well as water usage and conservation. The diameter of the pipe or valve, the pressure of the fluid, and any obstructions in the system are some factors that influence the flow rate.

Typically, in residential plumbing systems, the flow rate is measured at faucets and showerheads. It ensures they are operating at an efficient level. Low-flow options are becoming increasingly popular as a way to conserve water and reduce water bills, without sacrificing performance. They have lower flow rates than standard faucets and showerheads.

Terms That Must Be Known

  • GPM: Gallons Per Minute (A unit to measure water flow rate)
  • LPM: Liters Per Minute (Another unit to measure water flow rate)
  • PSI: Pounds Per Square Inch (A unit to measure water pressure)
  • GPF: Gallons Per Flush (A unit to measure flush volume)

Is 1.8 GPM Good For A Kitchen Faucet?

A flow rate of 1.8 GPM is a common standard for kitchen faucets in the United States. So, obviously, this flow rate is considered to be efficient. With this flow rate, anyone can conserve water usage in the home. In fact, 1.8 GPM is the maximum water flow rate for kitchen and bathroom faucets in California.

Are There Other Standards Of Water Flow Rate?

Yes, there are several other flow rate standards. Depending on the different types of plumbing fixtures, these standards may vary. Here are the other popular standards to measure water flow rate:

  • Showerheads: In the United States, the maximum flow rate for showerheads is 2.5 GPM. However, there are also low-flow showerheads available that use less water, usually between 1.5 and 2.0 GPM.
  • Bathroom Faucets: The maximum flow rate for bathroom sink faucets in the United States is 1.2 GPM. Normally, this is enough for most bathroom tasks, such as washing hands and brushing teeth.
  • Toilets: Flush volumes are commonly used to rate toilets. As I mentioned earlier, flush volumes are measured in GPF (Gallons Per Flush). The current federal standard for new toilets is 1.28 GPF. However, there are also ultra-low-flow toilets available that use even less water, typically from 0.8 GPF to 1.0 GPF.
  • Urinals: Flush volume can also rate urinals, which is also measured in GPF. According to federal law, the maximum flush volume for new urinals should be 0.5 GPF.

What Is The Average Flow Rate For Faucets?

A good faucet should have an average water flow rate of 1.0 GPM to 2.2 GPM. In the United States, the maximum flow rate allowed for all lavatory and kitchen faucets is 2.2 GPM. The rate should be at 60 psi.

With that said, in some regions of the US, it is allowed to have 2.5 GPM for kitchen faucets. In addition, some states allow a maximum flow rate of 1.2 GPM for bathroom faucets. However, the water flow rate should not exceed 2.2 GPM in the US, as stated by federal laws.

The average flow rate for faucets in the United States is regulated by the Environmental Protection Agency (EPA). In 1992, the U.S. Congress enacted the Energy Policy Act, which set national water efficiency standards for plumbing fixtures, including faucets.

So, it is always a good idea to check the specifications of the faucet to determine the flow rate. You can look for options that are WaterSense certified. These faucets have been tested and certified to meet water efficiency and performance standards set by the Environmental Protection Agency (EPA).

What Is The Best Flow Rate You Can Expect From A Kitchen Faucet?

In general, a flow rate of 1.5 GPM to 2.2 GPM is considered the best for most kitchen faucets. A water flow rate within this range strikes a balance between water conservation and practicality. It allows you to do all kitchen tasks smoothly, such as washing dishes, rinsing vegetables, and filling pots with water.

If you notice the current water flow rate from your faucet is lower, you can upgrade it to 2.2 GPM by installing laminar flow devices or aerators. On the other hand, if you want to conserve water and reduce your water bills, you can consider installing aerators or flow restrictors with flow rates as low as 1.0 GPM.

What Are The Local Codes And Regulations For Flow Rate Standards?

Local codes and regulations for flow rate standards can vary depending on the specific state, county, or city. I will mention the local regulations for the popular states in the US so that you can get an overall idea.

So, let’s start with the first state…


This state has some of the strictest water conservation regulations in the United States. For example, the state restricts the sale or installation of toilets with a flush rate greater than 1.28. Also, there are rules for showerheads and bathroom faucets to use no more than 1.0 and 1.2 gallons per minute, respectively.

New York City

There are strict regulations in New York for all new or replacement shower heads. According to the rules, all shower heads must have a flow rate of no more than 2.0 GPM. In addition, the city offers rebates for residents who install low-flow toilets or faucets.


In Colorado, new residential construction must comply with the WaterSense program requirements for toilets and faucets. This means that toilets must use no more than 1.28 GPF, and faucets must use no more than 1.5 GPM.


Depending on the specific municipality in Texas, local codes and regulations related to flow rate standards can vary. For instance, the City of Austin has regulations that require all new or replacement toilets to have a maximum flush volume of 1.28 GPF.

How To Increase A Faucet’s Flow Rate?

If you are experiencing a low flow rate from your faucet, you must be looking for ways to increase it. There are several ways to do it, but the following are the best.

  • Clean The Aerator: The aerator is the small mesh screen at the end of the faucet spout. It helps regulate the water flow and prevent splashing. Over time, it can become clogged with mineral deposits or debris. As a result, the water flow can be severely restricted. Then, you need to clean it by unscrewing it from the end of the faucet. After that, soak it in vinegar or a descaling solution to dissolve any buildup. Finally, rinse it thoroughly and reattach it to the faucet.
  • Remove A Low-Flow Aerator: If your faucet is using a low-flow aerator, it is the main reason for low water flow. To increase it, get rid of the low-flow aerator. To detach the aerator from a faucet, turn off the water supply first. Then, grip the aerator firmly at the base and turn it counterclockwise to unscrew it from the faucet spout. Once unscrewed, carefully pull the aerator away from the faucet spout.
  • Check The Supply Valves: If the flow rate is low in both hot and cold water, the problem may be with the supply valves. Make sure the valves under the sink are fully open. Don’t leave them partially closed since it can restrict water flow.
  • Replace The Cartridge: If you have a single-handle faucet and the flow rate is low only on one side, the problem may be with the cartridge. The cartridge controls the flow of water. It can become clogged or worn over time. To replace the cartridge, turn off the water supply, remove the handle and trim, and unscrew the cartridge. Replace it with a new one and reassemble the faucet. This will increase the water flow from your faucet.

How To Decrease A Faucet’s Flow Rate?

To ensure maximum savings on water bills, you should know how to conserve water. Reducing the water flow rate from the faucet is the best way to do this. Here are some ways to reduce the flow rate from your faucet.

  • Install A Low-Flow Aerator: A low-flow aerator is an easy and affordable way to reduce the flow rate of your faucet. A low-flow aerator replaces the existing aerator on your faucet and restricts the flow of water. Typically, it will reduce the water flow rate from 1.0 to 1.5 GPM. Hence, you can reduce water usage without sacrificing performance or functionality.
  • Replace The Cartridge: Again, the cartridge of your faucet can be responsible for high water flow when you are using a single-handle faucet. You may already know that the water flow is controlled by the cartridge. You should replace it with a new one when it is worn out or damaged. This will reduce the water flow rate to a more appropriate level.
  • Use A Flow Restrictor: A flow restrictor is a device that is installed inside the faucet to reduce the flow of water. It constricts the water flow and reduces the amount of water that is released from the faucet. Flow restrictors are available in different sizes. You may need to hire a licensed plumber to install them properly.
  • Adjust The Supply Valves: If too hot or cold water flows at high speed from your faucet, you may need to adjust the supply valves. Locate the supply valves under the sink. Once you locate the supply valves, turn them clockwise to reduce the flow rate.

Wrap Up: Is 1.8 GPM Good For A Kitchen Faucet?

I bet you have learned that 1.8 GPM is a good standard for a kitchen faucet by now. It ensures a balance between water conservation and functionality. Although 1.8 GPM refers to a good water flow rate, you should consider your specific needs and preferences when choosing a kitchen faucet. In addition, look for models that are WaterSense certified.

I hope you can conserve water and reduce your environmental impact by following this guide. At the same time, you will be able to enjoy the convenience and functionality of a high-quality kitchen faucet.


Oliver aka Arannyk Monon is a versatile content writer, editor, and content strategist. He has been writing for the last 10 years to help people get the actual information that they are searching for on Search Engines. He has proven expertise in Kitchen, automotive, camera, hosting, and other technical topics.

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