Plumbing troubleshooting
Low water pressure can affect one fixture, one part of the house or every faucet. Determining the pattern is the fastest way to narrow the possible cause.
If only one faucet or shower is affected, check whether the aerator or showerhead has visible buildup. Confirm that the fixture's shutoff valves are fully open. If hot water alone has low pressure, the issue may be connected to the water-heating system or hot-water piping.
When pressure changes throughout the home, possible causes include the main shutoff position, a pressure regulator, the municipal supply or a leak. Ask whether neighbors are experiencing the same issue and note whether the change was sudden or gradual.
Unexpected water use, damp areas, running-water sounds, staining or a sudden pressure drop can point to a leak. Shut off water when necessary to prevent damage and contact a plumber to locate the source.
Increasing pressure without understanding the plumbing can create new problems. The appropriate solution may be as simple as cleaning a fixture or may require evaluating valves, supply piping or a hidden leak.
Common questions
The aerator, cartridge, supply line or local shutoff may be restricted. Compare hot and cold flow to narrow the issue.
Yes. A significant leak can reduce available pressure, particularly when the change is sudden or accompanied by moisture or unexpected water use.