Low Water Pressure at Home? Plumber Explains the Likely Culprits
GREENSBORO, N.C. – November 06, 2026 -- If water pressure has dropped across your whole house, the cause could be anything from a half-closed main shut-off valve to corroded galvanized pipes, according to a HelloNation article featuring Plumbing Expert Tim Martin of Jimmy's Plumbing.
One weak tap usually means a local problem
A single weak faucet often points to a clogged aerator or a partly closed valve under that fixture. Older fixtures can also develop internal buildup that gradually reduces flow at just that tap.
Whole-house drops point to bigger causes
When pressure falls at every fixture, the article lists a partially closed main shut-off valve, a failing pressure-reducing valve and corroded galvanized pipes as common reasons. A sudden, sharp drop more often signals a break in the supply line than gradual buildup.