You turn on the kitchen faucet and get a sad trickle of water. Filling a pot takes forever. Rinsing dishes feels like watching paint dry. Low water pressure at the kitchen sink is annoying—and fixable.
This guide covers every cause and solution, from quick DIY fixes to when to call a professional plumber.
Describe your kitchen sink pressure problem and get connected to a licensed local plumber. Call (833) 567-5795 for same-day service.
Why Is Water Pressure Low at the Kitchen Sink?
Clogged Aerator
The aerator—the small screen at the faucet tip—is the most common culprit. Hard water leaves mineral deposits that block the tiny holes. Over time, flow decreases until you're left with a trickle.
Faulty Cartridge or Valve
The internal cartridge or valves inside the faucet can wear out or become blocked with sediment. This restricts water flow even when the supply is fine.
Partially Closed Shutoff Valve
The angle stop valve under the sink might not be fully open. These get bumped closed during storage or maintenance.
Supply Line Issues
The flexible supply line connecting to the faucet can kink, restrict, or become clogged. This is more common with braided stainless steel lines that have internal obstructions.
Whole-House Pressure Problem
If pressure is low at every fixture, the issue is in the main plumbing. Learn more about whole-house water pressure issues.
Call a plumber if:
- Pressure dropped suddenly at the kitchen sink only
- You hear humming or vibrating from pipes
- There are leaks under the sink
- Other fixtures also have low pressure
- The faucet makes unusual sounds when running
24/7 emergency plumbing service is available.
How to Fix Low Kitchen Sink Pressure (DIY Methods)
Step 1: Clean or Replace the Aerator
Time: 15–30 minutes
- Screw off the aerator from the faucet tip
- Soak it in white vinegar for 2–4 hours
- Scrub with an old toothbrush
- Rinse thoroughly
- Reattach and test
If the aerator is old or heavily clogged, just replace it—they're $5–$20 at any hardware store.
Step 2: Check the Shutoff Valve
Time: 5 minutes
- Locate the angle stop under the sink
- Turn it fully counterclockwise
- Test the faucet
Still trickling after cleaning?
Let our plumbers take a look. Call (833) 567-5795
Step 3: Inspect the Supply Line
- Turn off the shutoff valve
- Disconnect the supply line from the faucet
- Check for kinks or restrictions
- Look inside the fitting for debris
- Replace if damaged or blocked
Step 4: Check the Faucet Cartridge
If the above steps don't help, the internal cartridge may be the issue.
- Turn off water at the shutoff valves
- Remove the faucet handle
- Unscrew the retaining clip
- Pull out the cartridge
- Inspect for damage or buildup
- Replace if necessary—this typically requires a plumber
When to Call a Plumber for Kitchen Sink Pressure
Get professional help if:
- Cleaning the aerator doesn't improve pressure
- You suspect a faulty cartridge or internal valve
- The supply line needs replacement
- Pressure dropped suddenly with no obvious cause
- You have a double sink and only one side is affected
- Other fixtures in the house also have low pressure
Cost to Fix Kitchen Sink Water Pressure
| Solution | Cost | Notes |
|---|---|---|
| Clean aerator (DIY) | $0 | Vinegar soak—most effective fix |
| Replace aerator | $5–$20 | Hardware store or online |
| Shutoff valve adjustment | $0 | If valve was partially closed |
| Replace supply line | $15–$40 | DIY or professional installation |
| Cartridge replacement | $150–$300 | Professional service |
| Faucet replacement | $200–$600 | If repair isn't cost-effective |
How to Prevent Kitchen Sink Pressure Problems
- Clean aerators monthly with vinegar
- Check shutoff valves after any work under the sink
- Install a water softener if you have hard water
- Replace old faucets before they cause ongoing issues
Frequently Asked Questions
Why is the water pressure low only at my kitchen sink?
The most common cause is a clogged aerator. Mineral deposits from hard water block the tiny holes. Other causes include a faulty cartridge, stuck shutoff valve, or a restriction in the supply line.
How do I fix low pressure at my kitchen faucet?
Start by cleaning the aerator in vinegar. Check that the shutoff valve is fully open. Replace the aerator if old. If these don't work, the issue may be in the cartridge or supply line.
Can a clogged aerator cause low water pressure?
Yes. Aerators have very small holes—usually 0.5mm to 1.5mm. Mineral deposits can clog these completely, reducing flow to a trickle. Cleaning or replacing the aerator usually restores full pressure.
How much does it cost to fix kitchen sink pressure?
DIY cleaning: free. Replace aerator: $5–$20. Supply line: $15–$40. Professional cartridge replacement: $150–$300. We provide free estimates.
When should I call a plumber for kitchen sink pressure?
Call if cleaning the aerator doesn't help, if pressure dropped suddenly, if you have a double sink and only one side is affected, or if other fixtures also have low pressure.