Low Water Pressure at Home: A Practical Troubleshooting Guide
Low pressure can be caused by a single clogged aerator, a pressure regulator, a leak, or an issue with the home's water supply. Start by identifying how widespread the problem is.
Check more than one fixture
If only one faucet is affected, remove and clean the aerator and check the fixture shutoff valves. If several fixtures are affected, the cause is more likely upstream.
Compare hot and cold water
Low pressure on both sides points toward the fixture, supply, or piping. Low pressure only on the hot side can point toward the water heater or a hot-water valve.
Look at the pressure regulator
Homes with municipal water may have a pressure-reducing valve near the water entry. A regulator that is stuck or worn can affect pressure throughout the home and should be evaluated rather than adjusted at random.
Consider older piping
Galvanized steel piping can restrict flow as its interior corrodes. A plumber can identify whether a localized repair or a larger piping plan makes sense.