What would cause low water pressure in only one faucet?

Author: Albina Lakin  |  Last update: Thursday, November 23, 2023

The low pressure in the kitchen faucet is usually caused by one of two reasons - a clogged inflator or a clogged cartridge. The aerator is mounted at the end of the faucet.

Why is the water pressure low on one side of my faucet?

If the low water pressure seems restricted to a single faucet or showerhead, the problem isn't with your pipes or water supply, but with the fixture itself. If it's a sink, the most common causes are a clogged aerator or clogged cartridge.

Why is my water pressure low in one bathroom but not the other?

If the problem only occurs in one fixture – whether it's the sink, shower or tub – that fixture probably needs to be cleaned or replaced. For faucets, a clogged aerator can lessen water pressure. Clean faucets by unscrewing the nozzle and placing it in a solution of vinegar and water.

Can a bad faucet cartridge cause low water pressure?

A Clogged Cartridge

This device has an important job — when you lift or turn the faucet handle, the cartridge is responsible for opening valves and letting the water flow into your sink. If there's a problem with the cartridge — such as a blockage — you're likely to encounter low water pressure.

Why is my faucet water flow weak?

If you've cleaned the aerator and the water flow is still weak, there may be a clog in the pipes. As time goes by, mineral deposits build up in your pipes. This will slow water flow and, eventually, may even cause your pipes to burst. Now is a good time to call in a professional plumber.


What is the most common cause of low water pressure?

Partially Closed Valve

One of the most common issues that can lead to low water pressure problems is that the water is being obstructed by one or more partially closed shutoff valves. Typically, a home will have one main shutoff valve located inside the house.

Can a bad water heater cause low water pressure?

If there's an accumulation of sediments in your hot water tank, it can lower your water pressure. The presence of kinks in the flexible water pipes used in water heaters can result in low water pressure. If the shut-off valve isn't fully open, water pressure can drop.

Why is my water pressure low upstairs but not downstairs?

A blockage in the pipe on the top floor

Sometimes a constriction in the water pipeline also can be a reason of low water pressure in one part of your house. If you see the water pressure is weak only on the top floor of your house, then it is certainly due to blockage in the pipes or valves.

How do you fix unequal water pressure?

The solution is to install a pressure balance valve. This won't stop the pressure from fluctuating but it WILL keep the balance between hot and cold water steady and avoiding those unpleasant temperature changes. Secondly, you should have your water company or plumber check the water pressure at the main.

Why is the water pressure low in my kitchen sink but nowhere else?

Low water pressure in sink faucet

Clogged aerators and clogged cartridges are two of the most common causes of low water pressure in a sink. The aerator is the tip of the faucet that the water comes out of, while the cartridge is found underneath the sink handle and enables you to stop and start the flow of water.

What causes uneven water pressure in a house?

Improper installation of an appliance: A nearby appliance, like a dishwasher or water heater, could cause water pressure problems to connected fixtures. Clogs and damaged pipes: Drain clogs and damage normally cause drops in water pressure in the fixtures or appliances connected to them.

How do I fix sudden low water pressure in my house?

6 Ways to Fix Loss of Water Pressure in Your House
  • Fix Leaks. Once you've identified a leak, you can clean and seal it yourself. ...
  • Open Valves. To find the water meter valve, locate your water meter. ...
  • Clear Buildup or Corrosion in Pipes. ...
  • Alleviate Water Demand. ...
  • Fix a Broken Pressure Regulator. ...
  • Clean Fixtures.

Can a bad pressure relief valve cause low water pressure?

If the PRV is improperly adjusted, or has failed, it can result in a pressure loss or even no water downstream.

Who is responsible for low water pressure?

In addition to the mains stop valve outside the home, you'll have one inside. Your internal stop valve is most likely beneath the kitchen sink. Your external stop valve is owned by the water company. If it's open yet the pressure here falls below one bar, it's their responsibility to improve it.

Can a bad shut off valve cause low water pressure?

Two main shut-off valves control the water flow in your home — one on or in your home and one at the meter. If one of these valves is partially or fully turned off for some reason, it can cause your water pressure to decrease considerably.

Why is my water pressure upstairs suddenly low?

If it's a sudden new problem, it could be caused by a leak in your plumbing system somewhere, or by a drop in water pressure by your water supplier, or a piece of sediment that's suddenly broken free from your water heater or elsewhere and clogged your shower head (unlikely if it's affecting both showers).

How do I know if my water pressure regulator is bad?

Some of the first signs of a failing pressure regulator are a leaking water heater or commode. The water coming from a faucet may also exit with such force that splashing or water “hammering” may occur.

How do you clear a clogged water pipe?

You can make a DIY unclogging mixture from a couple of household supplies. With items like vinegar, baking soda, and water, you can make an effective and eco-friendly mixture for unclogging your pipes and drainages. What is this? The baking soda and hot water will help loosen up any build-up in clogged pipes.

How can I make my faucet water stronger?

A quick and easy way to increase water pressure is to adjust the pressure-reducing valve, which can be found in your home, usually close to your water meter. If your pressure gauge reading was low, make slight adjustments to your regulator.

What controls the flow of water in a faucet?

Indoor faucets usually have aerators at the tip. This small but valuable part consists of a mesh responsible for the consistent water flow. Since it controls water pressure, it reduces water splashing in the sink.

Why is one of my faucets not working?

If only one faucet is having problems, you may simply be dealing with a clogged aerator. You should also see if the faucet's stopcock is open, as this too may be causing it to shut off.

Can air in pipes cause low water pressure?

These air bubbles usually find their way to the highest points in your plumbing system, lower water pressure, and inhibit the flow of water through the pipes. Air in the water piping system can cause rust and corrosion. Rusted pipes weaken, and the rust can drop sediment into your water.

Can low water pressure be temporary?

The city could be flushing hydrants.

In any of these cases, the pressure loss will be temporary. But when the water does come back online, it will definitely kick up sediment, which can clog supply valves and faucet aerators. Be prepared to flush them if the pressure seems low when the water comes back on.

Should water pressure be the same throughout a house?

Typically, this shouldn't cause an issue because homes have a pressure switch. This valve helps to keep pressure constant throughout the home matching the supply of the water pressure to the demand. If this valve goes bad it can cause water pressure to fluctuate if more than one fixture is using water.

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