How to Increase Low Water Pressure in Your Home

Water pressure is one of those things you never notice until it disappears. When your morning shower turns into a weak drizzle or the kitchen faucet takes an eternity to fill a pot, it is more than a minor annoyance; it is a sign that your plumbing system is struggling to deliver the volume you need. Done well, diagnosing this issue is a logical process of elimination that often leads to a simple, inexpensive fix. Before you start tearing into walls or calling in expensive pros, you need to isolate whether the issue is local to one fixture or affecting the entire house. If the whole house is struggling, the culprit is usually sitting right near your main water line or at the municipal connection. By methodically checking your valves and regulators, you can usually restore strong, consistent pressure in an afternoon without needing a professional plumber.

  1. Open the Main Valve First. Locate your home's main water shut-off valve, typically found in the basement or near the exterior perimeter. Ensure the handle or wheel is turned completely to the 'open' position, as even a partially closed valve will significantly restrict flow.
  2. Dissolve Mineral Buildup Fast. Unscrew the aerator screens from the tips of your faucets using pliers protected by a rag to prevent scratching. Soak the screens in white vinegar for an hour to dissolve mineral deposits, then scrub them clean with a toothbrush before reattaching.
  3. Fine-Tune Your PRV Setting. Locate the Pressure Reducing Valve (PRV), a bell-shaped device usually found on the main supply line shortly after it enters the home. Use a screwdriver to adjust the top bolt—turning it clockwise increases pressure—but do not exceed 75 PSI to avoid damaging your pipes.
  4. Hunt Hidden Leaks Now. Turn off all water fixtures and walk to your water meter to see if the dial or flow indicator is still moving. If it is moving, you have a hidden leak somewhere in your piping that is bleeding off your pressure.
  5. Drain Sediment From Heater. If pressure is low only when using hot water, your water heater may have sediment buildup. Attach a garden hose to the drain valve at the bottom of the heater and drain a few gallons into a bucket to clear out mineral sludge.
  6. Check With Your Water Department. If you have ruled out all internal issues, call your local water department to ask if there are known pressure drops or maintenance work in your area. Sometimes the utility company is doing work on the main lines that temporarily reduces flow to your neighborhood.