Clogged aerator
Mineral deposits can reduce flow at a single faucet.
Plumbing troubleshooting
Low Water Pressure: What the Pattern Tells You
Low water pressure can affect one fixture or the whole home. The pattern helps narrow down whether the cause is local buildup or a supply-side issue.
Common causes
Partially closed valve
A fixture shutoff or main valve may not be fully open.
Supply issue or leak
A sudden whole-home drop can signal a utility interruption, pressure regulator problem, or leak.
Safe checks you can make
- Compare hot and cold flow at several fixtures.
- Check whether neighbors have the same issue or the utility has posted an outage.
- Inspect accessible valves and aerators without forcing them.
When to call a professional
Call a plumber for a sudden unexplained pressure drop, signs of a leak, or pressure problems across the home.
Explore other plumbing problems
This guide is general information, not a diagnosis. If water is near electricity, avoid the area and get immediate professional help.