What causes water pressure changes in your home

Water pressure changes at home can be frustrating and confusing. Most homeowners experience occasional dips or spikes, but understanding the typical culprits makes it easier to diagnose and fix issues without overhauling your plumbing.

Common causes

1) Leaks and hidden corrosion: Small leaks in pipes or fittings can drain pressure gradually, especially if they’re behind walls or under floors. Corroded galvanized pipes or aging copper can constrict flow, leading to lower pressure in some areas while others stay unaffected.

2) Pressure regulator problems: Many homes rely on a pressure-reducing valve (PRV) to keep incoming pressure in a safe range. A faulty or misadjusted PRV can cause high or low pressure that affects multiple outlets.

3) Water main or supply line issues: Pressure drops can occur if the municipal supply or shared service line experiences maintenance, bursts, or reduced flow during peak usage. Seasonal demands and nearby construction can also influence pressure at your curb stop.