How to Fix Low Water Pressure in a Faucet
Quick Answer
Remove and clean the aerator, check the shutoff valves under the sink, and inspect the supply lines for kinks or debris.
How to troubleshoot Low Water Pressure in a Faucet
Low water pressure from a faucet is often caused by a clogged aerator or blocked cartridge. This guide covers cleaning and checking the aerator and supply lines.
Step-by-Step Fix
- Turn off the faucet and remove the aerator from the end of the spout using pliers (wrap with tape to avoid scratches).
- Disassemble the aerator and soak the parts in white vinegar to dissolve mineral deposits.
- Rinse and reassemble the aerator, then screw it back onto the faucet.
- Check the shutoff valves under the sink to ensure they are fully open.
- Inspect the supply lines for any kinks or clogs and straighten or replace them if needed.
Common Error Codes
| Code | Meaning | Resolution |
|---|---|---|
| Pressure still low | Blocked cartridge or valve | Remove and clean or replace the faucet cartridge. |
| Water sprays unevenly | Aerator not seated correctly | Reinstall the aerator with the rubber washer in the correct position. |
Frequently Asked Questions
Can hard water cause low pressure?
Yes, mineral buildup in the aerator and cartridge is a common cause.
What if both hot and cold water have low pressure?
Check the main shutoff valve and the aerator; it is likely a clogged aerator.