Household water pressure higher than 80 psi can stress your plumbing system, leading to leaks, bursts, and premature wear on fixtures and appliances. In this guide, we’ll walk you through how to test your water pressure, interpret the results, and apply the right repair solutions to protect your home.
What Is Considered High Water Pressure?
Water pressure in most homes runs between 40 psi and 60 psi. Anything above 80 psi is considered high and can cause visible problems over time. Municipal systems sometimes deliver at 100 psi or more, so it’s important to know your home’s baseline.
Signs Your High Water Pressure Is Damaging Your Pipes
- Water hammer. A loud banging noise when a faucet shuts off indicates shock waves in the line.
- Frequent leaks. High pressure can force sealants out of joints, causing drips at fittings and fixtures.
- Appliance wear. Shortened lifespan of washing machines, dishwashers, and water heaters.
- Higher water bills. Even small pinhole leaks let water escape continuously.
How High Pressure Damages Different Pipe Materials
Copper
Stress fractures and pinhole leaks can develop under sustained high pressure.
PVC/CPVC
Cracking and joint separation occur when the plastic is forced beyond its pressure rating.
Cast Iron
Accelerated internal corrosion can lead to holes and weakened sections.
DIY Diagnosis: Testing Your Home’s Water Pressure
- Attach a pressure gauge to an outdoor spigot or a laundry hookup.
- Open the valve fully, let the gauge stabilize, and note the reading.
- Document morning and evening readings for one week to spot trends.
A stable reading between 50 psi and 60 psi is ideal. Anything consistently above 80 psi calls for corrective action.
Repair Solutions for High Water Pressure
Installing a Pressure Reducing Valve (PRV)
A PRV automatically lowers incoming pressure to a safe range.
- Size the valve based on your main line diameter.
- Install on the main feed just after the shut‑off.
- Typical cost: $200–$400 including parts and labor.
Adjusting Your Existing PRV
If you already have a PRV:
- Locate the adjustment screw on top.
- Turn clockwise to reduce pressure into the 50–60 psi range.
- Retest with your gauge to confirm.
Repairing Pipe Damage Caused by High Pressure
- Copper sections. Cut out fractured segments and solder in new pipe.
- PVC joints. Remove cracked fittings and reseal with certified PVC primer and cement.
- Full replacement. For multiple leaks or irreparable damage, consider a full run; see our sewer line repair service.
When to Call a Professional for Water Pressure Issues
- Hidden leaks behind walls or under slabs.
- Complex PRV setups in multi‑story homes.
- Local code requirements or permit needs.
- Signs of mold or wall staining around plumbing fixtures.
Preventative Maintenance to Avoid Future Damage
- Test pressure annually with a gauge.
- Schedule a video pipe inspection to detect hidden weak spots.
- Flush and clean lines with professional mechanical drain cleaning before damage worsens.
- Upgrade fixtures to pressure‑tolerant models rated for higher psi.
Frequently Asked Questions
What’s the ideal household water pressure?
Most experts agree on 50 psi to 60 psi for safety and performance.
Can high pressure damage water heaters?
Yes. Excessive pressure can weaken the tank and shorten its life.
How often should I test my water pressure?
Once a year, or after any major plumbing work, to ensure your PRV remains properly set.