Uncover Why Your Kitchen Sink Has Low Water Pressure
Having low water pressure at the kitchen sink can be frustrating when trying to complete everyday tasks. Understanding the root cause is key to restoring normal water flow so you can efficiently wash dishes, prepare meals, and keep your kitchen running smoothly.
Symptoms of Low Sink Water Pressure
How do you know if the water pressure is lower than normal? There are some clear signs:
- Reduced flow rate from the faucet
- Taking longer to fill pots or the dishwasher
- Inability to run hot and cold water simultaneously
Test Your Kitchen Sink's Water Pressure
Before troubleshooting, it helps to test and quantify the pressure. This gives you a baseline to compare with standard household water pressure.
You'll need a water pressure gauge, adjustable wrench to attach it, and a bucket to catch water. Find the hose bib or laundry hookup, connect the gauge securely, then turn on the faucet. Note the pressure reading on the gauge. Standard household water pressure ranges from 45 to 80 PSI. Consistently lower readings indicate an underlying issue.
Check for Plumbing Problems Throughout the House
Sometimes decreased kitchen sink pressure isn't isolated, but due to an issue reducing water pressure in the whole home.
Potential Causes of Low Pressure Housewide:
- Ageing supply lines from municipal system
- Leakages allowing water to escape
- Higher usage decreasing pressure in mains
- Malfunctioning main shutoff valve
- Partial blockage of the water meter
If your bathroom or outdoor faucets have low pressure too, the root cause likely extends beyond the kitchen. Your whole-house plumbing setup may need investigation and repairs.
Checking the Main Water Shutoff Valve
Locate the valve that controls water flow entering your home. Test that the valve fully opens and closes. Remove any debris obstructing it from sealing properly. If the unit is faulty, replacement is necessary.
Pinpoint the Source of Low Kitchen Sink Pressure
For sink-specific low water pressure, the following localized issues could be to blame:
Common Causes of Low Water Pressure at One Sink:
- Partially closed supply valves
- Clogged faucet aerators
- Leakages from pipe joints
- Malfunctioning faucet cartridge
Inspecting Supply Valves and Faucet Aerators
Check below the sink for the shutoff valves controlling hot and cold water flow. Make sure both valves are fully open.
Also unscrew the faucet aerator at the tip of the faucet spout. Rinse out any debris clogging the screen. Reattach the aerator once clear of obstructions.
Recent Plumbing Changes Can Also Cause Issues
If your kitchen plumbing setup was recently altered, it may factor into decreased water pressure:
- Added supply lines for new dishwashers or sinks
- Renovations rerouting pipe routes
- Irrigation systems now sharing water lines
Increased demand from added fixtures can overcome your existing water main's capacity. Upgrading to larger supply pipes may be needed.
When to Call a Professional Plumber
If DIY efforts haven't restored full water pressure, it's best to call a professional. They have specialized tools and expertise addressing stubborn low pressure issues resulting from leaks, corrosion, or piping restrictions.
While multiple issues can contribute to low kitchen sink water pressure, methodically addressing each possibility will lead you to the root cause.
Follow standard troubleshooting steps, verify flow rates meet typical household benchmarks, and repair any underlying issues to quickly regain proper pressure.