Why Would Water Pressure Be Low In Just One Faucet? [Tips To Solve]

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It’s annoying to see one faucet with water flowing slower than others. Your housework will take more time to complete, too. So why would water pressure be low in just one faucet?

There must be some problems with the piping system. If you’re ready to tackle your low water pressure issue, start by following the tips we share here!

Why Would Water Pressure Be Low In Just One Faucet?

If only one of the faucets in your house runs with low pressure, the root of the problem can be right in the faucet or the pipeline/valve connected to it.

Here are some possible cases to expect:

Clogged pipe

The pipe accumulates dirt, sand, and debris over time. The buildup will prevent water from flowing smoothly, reducing the water pressure in the faucet.

You may use municipal or well water. But if you choose the latter, blockage issues in water pipes will be more common because well water contains more dirt and sand.

Leaky pipeline

The water pressure may not change. But if it’s too strong, the pipeline will suffer. For example, the forceful impact will make it crack. Then, water leakage will reduce its pressure.

Leaky or locked valve

Often, each room has a separate valve. When it gets locked, the faucet connected to it stops working. There are two situations for the valve:

  • If you lock the valve partially, water can still run, but the hydraulic is weak. Hence, water pressure will decrease.
  • If you use the valve too long, it must be mushy over time. There can be leakage, reducing the water pressure.

Clogged hydrant

The discs and rubber bands in a faucet collect residues and minerals in the water. Finally, they will clog your faucet and slow down the water flow.

Faulty aerator

The aerator is a small screen at the end of a faucet. It may accumulate mineral deposits and block the water, too.

Water pressure in a faucet may become low for multiple reasons
Water pressure in a faucet may become low for multiple reasons

How To Fix Water Pressure Be Low In Just One Faucet?

The best solution for your case depends on the cause of the reduced water pressure in your faucet. Here is what you should do to address it.

Pipe issues

If the problem comes from the external pipe, it will be easy to fix. But often, it happens to the pipes in the ground or wall. If it’s your case, contact a professional plumber to repair it. They can use specialized tools to find the leaks, then seal them. If necessary, they will replace the pipe.

Valve issue

If you don’t seal the valve fully, the water pressure will be weak. So, check the “open” icon on the valve to open it properly. And if the valve leaks, you need a replacement.

Faucet issue

If the faucet restricts the water flow because of the debris and mineral buildup, you can clean it with a toothbrush and vinegar. All you need to do is to immerse the faucet in the vinegar solution for about 30 seconds and brush it.

The faucet may malfunction because of the damaged rubber band stretching over time. If you notice the overstretched band, replace it.

Aerator issue

If the aerator is causing the problem, clean it. If you can’t remove it, try unclogging it right in its position. The instructions are as follows:

  • Remove the aerator from the faucet’s end by unscrewing it.
  • Detach the parts of the aerator.
  • Rinse the mesh screen with water.
  • Soak the aerator in the vinegar solution for about 20 minutes.
  • Scrub it using a toothbrush.
  • Reassemble the aerator.

You can learn more tips for cleaning the aerator from this video:

The pipe and other faucet parts can get clogged easily because they work with debris daily. Hence, you need to clean them every six months to ensure they are in good condition.

Take quick action to get strong water flows back to the line
Take quick action to get strong water flows back to the line

What If My New Faucet Has Low Water Pressure?

A faucet usually has low water pressure because of the dirt accumulation within the pipe, valve, and the faucet itself over time. But what if you have the same issue with a new faucet?

Debris may also get stuck in the cartridge holes. It comes from filing, soldering, and installing the new pipes.

The cartridge holes are in charge of directing water to flow across the cartridge to the faucet spout. So when they get clogged, the water pressure will be lower.

Solving this issue is straightforward. You just need to remove what clogs the holes. Again, it’s still a matter of clearing the debris that slows down the water flow.

A new faucet may also have low water pressure
A new faucet may also have low water pressure

Is Low Water Pressure Dangerous?

Yes, sometimes. In many countries, governments even have regulations about plumbing systems because low hydraulics may be dangerous.

For example, they recommend using shower valves to equalize water pressure and minimize risks of injuries when such problems occur.

When confirming that the pipe or valve in your house is leaking, you must check the wall and base of both sides. Water may leak into the wall and peel it.

If you have a plaster ceiling, the moisture will cause large pieces to fall off, endangering your life.

Water pressure will decrease because of the leak. A small can lead to a significant force. It will be dangerous when shooting at someone in your house.

Low water pressure can be dangerous
Low water pressure can be dangerous


The water pressure in one faucet in your house is lower than in others due to leakage and blockage issues. Once you identify the cause, you can solve it.

If you’re unsure about solving the problem yourself, it’s always best to consult a licensed plumber. Then, your water can flow smoothly and efficiently.

Thank you for reading!