Low water pressure can come from something as simple as a clogged fixture or from a broader plumbing or supply issue. The first step is figuring out whether the problem affects one fixture, one area, or the whole home.

If Only One Fixture Is Affected

Start with the faucet aerator or showerhead. Mineral buildup and debris can restrict flow. Cleaning or replacing a small fixture component may solve a localized problem.

If Several Fixtures Are Affected

When pressure is low in multiple places, the issue may involve a shutoff valve, pressure regulator, supply line, or the water utility. Check that accessible main shutoff valves are fully open, but avoid forcing a valve that is stuck.

Compare Hot and Cold Water

If the problem mainly affects hot water, the water heater or hot-water piping may be involved. If both hot and cold are affected throughout the home, the cause may be farther upstream.

Watch for Signs of a Leak

Unexpected water use, damp areas, sounds of running water, or pressure that changed suddenly can justify a leak check. Hidden leaks should be investigated promptly to limit property damage.

Bottom Line

Low pressure is easier to diagnose when you can explain exactly where it happens and whether it changed suddenly. Those details can save time when you speak with a plumber or utility provider.