Why Is My Kitchen Sink Water Pressure Low

ByHachiskitchen Staff
Updated: Mar 15, 2024



Clogged aerator, blocked cartridge, a problem with municipality water supply, etc., can be the reasons for which you face low kitchen sink water pressure.

Usually, we don’t think about the kitchen sink too much until we face any plumbing issue. A kitchen sink with low water pressure is usually one of the issues we face. While cooking up a 5-star meal or washing hands before dinner, you can find these problems. This article lets you know about the problems, how to fix the issue, when you need to contact a plumber, etc.

What Causes Low Water Pressure In The Kitchen Sink?

Clogged Aerator

It is the first thing you should check when your kitchen sink has low water pressure. The recent kitchen faucets usually come with an aerator. It helps to remove debris and minerals from the water supply. Thus, it can offer clean, fresh tap water. But filtering all debris indicates that your aerator can get clogged over time. In this case, you need to clean or replace it completely depending on the level of sediment buildup within it. There are a few sinks designed in a way allowing you to remove the aerator yourself. Go through these steps to do it.

  • Your first task is to get rid of the aerator from the faucet with the help of slip-joint pliers and a towel. Sometimes, you may have to use a twist-off motion rather than plier removal.
  • Enable the faucet again to test water pressure. If the water pressure comes back suddenly, ensure that your aerator is the culprit.
  • Check if there are any clogs, gunk, or mineral deposits.
  • After that, your job is to rinse it using hot water. Soak the aerator in vinegar overnight to get rid of stubborn gunk.
  • You can take the help of a small toothbrush or cleaning brush.
  • Now, return it to the place.
  • When you clean your aerator, the water pressure issue should disappear. If it is broken completely, you may need to call a plumber to replace it with a new one.

Why Is My Kitchen Sink Water Pressure Low

Blocked Cartridge

After applying the first process, you may need to replace or clean the aerator if you find the issue. All kitchen sinks don’t have cartridges, but you should check if your cartridge does. It helps to regulate the flow of water in your kitchen sink. These are designed for being replaced. Therefore, you should not expect them to last long. A clogged cartridge can cause the problem. If you want to check whether a blocked cartridge is causing the issue of low water pressure, you should go through these steps.

  • Your first task is to look for the supply valves and disable them to your kitchen sink.
  • Then, you should run your faucet until any water comes out.
  • After that, remove the valve handle, screw cap, and screw. In this case, you may have to use an Allen wrench or hex key.
  • When you remove the valve handle, lift out the cartridge. You might have to unscrew some more screws and bolts before removing the cartridge fully.
  • You should inspect the cartridge for extra dirt or wear. In this case, try to clean it using a mixture of vinegar and water. Hence, we advise you to replace it with a matching cartridge.

Municipal Water Supply Issue

If nothing can help you to get rid of the water pressure issue, you should talk to the neighbors. Ensure that it is a municipal water supply for which they face the problem. Your city may work on the supply line for maintenance. The supply line works as the connection between your home to the municipal water lines. Sometimes, it can cause an issue. Hence, you should contact your water service company.

Faulty Pressure Reducing Valve

Generally, a kitchen sink comes with a pressure reducing valve, called a PRV or pressure regulator valve. It comes in a bell size. Hence, you should adjust the valve to see if it can affect the water pressure. Ensure that you have disabled the supply valves before attempting to remove them. If you can not fix the problem by adjusting the PRV or finding clear signs of damage, you may require a replacement. Take the help of plumbing services professional to replace the valve easily.

Shutoff Valve Malfunction

You can find a shutoff valve in the sink below, which you can get available. The shutoff valve helps to stop the water supply to the sink. But it can be rigid over time and build up the rust as you won’t need to use the valve. Jostling items enables you to nudge the valve for which you can face the problem. Ensure that your shutoff valve remains open always. If your sink comes with both hot and cold water shutoff valves, ensure that you should keep both open. Use a replacement if you find a leak. With the help of a plumber, it is possible to take care of the issue.

Pipe Leak

One hole or loosened pipe joint is sufficient to cause a leak, and air can enter through one leak only your pipes. But you can not fix a pipe leak issue because it is a complex plumbing system. Hence, you should stop the water supply and contact a plumber to resolve the problem.

Water Line Problem

The waterline works as the connection between your appliances and sinks to the pipes. Therefore, if there is a leak in the waterline, it can cause low water pressure in your sink. Hence, you need to turn off the faucets and water supply valves. After that, you should take a water meter reading. After waiting for four hours, you need to take another reading. If you find a change in the reading, there is a leak in the waterline. You can’t resolve the problem with DIY repair. Hence, you should take help from emergency services.

Also Read: 10 Popular Kitchen Sink Designs You Must Know About

Find the Source of Low Water Pressure in Kitchen Fixtures

  • Waterline problem
  • Blocked cartridge
  • Municipality waterline issue
  • Faulty pressure reducing valve
  • Clogged aerator
  • Pipe leak

How Do I Fix Low Water Pressure In My Kitchen Sink?

  • If you want to clean a Clogged Aerator, you should soak it in vinegar mixed with some water before brushing. You may take the help of pliers while facing issues in setting up the aerator.
  • You should stop the water supply to your kitchen faucet to fix a Clogged Cartridge.
  • You can resolve the issue with a faucet, but it relies on your model. As our faucet can get clogged, you should clean all parts. It helps to fix the low water pressure problem.
  • If necessary, it is possible to deal with a pipe leak, blocked Water Supply Lines, adjust a Pressure Reducing Valve, etc.

What if My Hot Water Pressure Is Low but Cold Is Fine?

Do you have a sink where the hot water pressure is low but cold is fine? If it is, ensure that you are having problems with a water heater. When the water heater is facing a low water pressure, it will not affect only one faucet. Instead, all faucets can get affected after turning on the hot water. However, these can also build up sediment over time if you have not flushed regularly. You need to flush the tank and tankless water heaters annually. Calcium and other materials can build up, and if you don’t remove them, these might decrease the water heater’s capacity to heat water. As a result, your water heater will need more energy.

Read Also:How To Unclog A Double Kitchen Sink With Standing Water

Frequently Asked Questions

1. How do I increase the water pressure in my kitchen sink?

If you want to increase your faucet’s water pressure, you need to find the two valves underneath your sink. It helps to control both hot and cold water. Then, you need to turn these valves counterclockwise to boost water pressure.

2. How To Fix A Leaky Kitchen Faucet?

  • If you are willing to fix a leaky kitchen faucet, your job is to pry off the decorative cap on the handle. After that, your task is to remove the screw of the handle and till back it. Then, you should pull it off.
  • If you find any threaded retaining clip holding the cartridge, you need to take the help of needle-nose pliers to remove it. Thereafter, your task is to pull up the cartridge.
  • After removing the spout, you should cut off the old O-rings with the help of a utility knife. Next, you must use a plumber’s grease to cover the new O-rings.
  • If you are willing to replace the whole cartridge, try to match its length with the length of the replacement. It is better if the length of the stem end is the same.

3. How Much Should Labor Cost Install A Kitchen Faucet?

$120 to $250 is the average price to install a kitchen faucet for labor. For faucets, materials, and labor, the cost becomes between $250 and $600.

4. How To Clean A Clogged Aerator?

Your first task is to soak it in a glass containing vinegar to loosen minerals. Generally, five minutes of soaking helps to loosen the particles. You can use the toothbrush’s help to scrub out its inside part. Ensure that you use a toothbrush to clean a clogged aerator.

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