Is pressure low everywhere?
Compare several fixtures. A single-fixture problem may be a clogged aerator, local valve, or fixture issue, while whole-house weakness points toward the supply or pressure system.
Common system causes
- Waterlogged or improperly charged pressure tank
- Clogged filter or treatment equipment
- Pressure-switch or gauge issue
- Worn pump or inadequate pump output
- Hidden leak or restriction
- Low well yield during heavy demand
Helpful observations
Note the pressure gauge readings, when pressure drops, whether the pump cycles rapidly, and whether the issue changes when multiple fixtures run.