How to Increase Water Pressure in Your House
Diagnose low pressure, test with a gauge, adjust the regulator, and boost flow for better showers, faster washing, and healthier plumbing.
Start Diagnosing →Did you know? Low water pressure affects more than 30% of households at some point. Whether it's a weak shower, slow-filling appliances, or sputtering faucets, the solution is often simpler than you think. This guide walks you through every step—from diagnosis to DIY fixes and when to call a pro.
1. Diagnose Your Water Pressure Problem
Before you buy anything, determine if the issue is with your entire house or just one fixture. Use a water pressure gauge (screws onto an outside spigot or laundry faucet) to get a baseline reading. Normal residential pressure is 45–65 psi; anything below 40 psi is considered low.
If the pressure is low everywhere, the problem is likely your main water line, pressure regulator, or supply valve. If only one faucet or shower is weak, clean the aerator or showerhead—mineral buildup is a common culprit.
For a deeper dive into home plumbing systems, see our guide on Home Systems & Plumbing.
2. Main Causes of Low Water Pressure
Pressure Regulator Malfunction
Your main regulator may be stuck or set too low. Adjusting it often restores full pressure.
Partially Closed Valve
Check the main shut-off valve and any secondary valves. A half-closed valve restricts flow significantly.
Clogged Pipes or Fixtures
Mineral deposits, rust, or sediment can narrow pipes over time, especially in older homes.
Well Pump Issues
If you're on a well, the pump pressure switch or tank bladder might need adjustment or replacement.
If you suspect a more complex issue like a hidden leak or corroded pipes, consider consulting a plumbing contractor near you.
3. Test Your Pressure with a Gauge
Buy a water pressure test gauge (about $10–$20) and attach it to an outdoor hose bib or washing machine valve. Turn on the water fully and note the reading. For accurate results, test during peak usage hours (morning and evening) and again late at night.
Pressure ranges:
- Below 40 psi: Low – investigate immediately.
- 40–60 psi: Normal but could be improved.
- 60–80 psi: High – may damage appliances; consider installing a pressure reducing valve.
If your reading is below 40 psi, follow the steps below to increase it. For well owners, check the well pump pressure guide.
4. Adjust the Main Pressure Regulator
Most homes have a pressure reducing valve (PRV) near the main water shut-off, usually a brass bell-shaped device with a screw on top. To increase pressure:
- Loosen the locknut on the regulator with a wrench.
- Turn the adjustment screw clockwise (righty-tighty) to increase pressure. Turn it in small increments (half-turn at a time).
- Test the pressure with your gauge after each adjustment. Aim for 50–55 psi for optimal flow.
- Tighten the locknut when you're satisfied.
Important: Never exceed 75 psi, as high pressure can damage pipes, water heaters, and cause leaks. If you're unsure, a general contractor can help you safely adjust the regulator.
5. Clean Aerators and Showerheads
Sediment and mineral buildup can reduce flow even when overall pressure is fine. Remove each aerator and showerhead, soak them in vinegar overnight, and scrub with a small brush. This simple fix can increase perceived pressure dramatically.
While you're at it, check the supply lines under sinks—corroded or kinked hoses are another common bottleneck. For a comprehensive home maintenance checklist, explore our Home Safety & Maintenance section.
6. When to Call a Professional
If you've adjusted the regulator, cleaned fixtures, and your pressure remains below 40 psi, you may have a hidden leak, corroded pipe, or well pump problem. These issues require professional tools and expertise. Contact a licensed plumber or home improvement contractor to inspect your system.
For major renovations that involve re-piping or installing a booster pump, always get multiple quotes. Ask about cost estimates and compare warranties. Investing in a professional now can save you thousands in water damage later.
7. Booster Pumps & Alternative Solutions
If your home has chronically low pressure due to municipal supply or elevation, a water booster pump can be a game-changer. These systems (starting around $200–$400) install on your main line and increase pressure throughout the house. They're especially effective for multi-story homes or properties with long supply lines.
Other quick wins include:
- Replace old galvanized pipes with copper or PEX (improves flow and water quality).
- Install a constant-pressure well system if you're on a well.
- Add a pressure tank to smooth out pressure fluctuations.
For budgeting your project, see our remodeling cost calculator to estimate materials and labor.
Frequently Asked Questions
Can I increase water pressure myself?
Yes—adjusting the pressure regulator, cleaning aerators, and opening valves are all DIY-friendly. For pump or pipe repairs, hire a professional.
What is normal water pressure for a house?
Ideal pressure is between 45 and 65 psi. Pressures above 80 psi can damage appliances and should be reduced.
How much does it cost to install a booster pump?
Materials range from $200–$500, and professional installation adds $300–$600, depending on complexity. Total: $500–$1,100.
Does a water pressure regulator increase pressure?
No—a regulator reduces high incoming pressure to a safe level. But if it's set too low, you can adjust it up to increase household pressure.
Why is my water pressure low in one shower only?
Most likely a clogged showerhead or mixing valve. Clean the head first; if that doesn't fix it, replace the cartridge.
Ready to boost your water pressure?
Start with a pressure gauge, inspect your regulator, and clean your fixtures. Most issues are resolved in under an hour. For more complex projects, find a home improvement expert near you and get professional results.
Already planning a full bathroom or kitchen remodel? Check out our guides on bathroom renovations and kitchen remodeling contractors to upgrade your home's water systems.
