Ask a Master Plumber: Is High Water Pressure Dangerous? - Lujan Plumbing

That strong shower might feel great, but high water pressure can quietly damage your plumbing system over time.

Many homeowners think strong water pressure is a good thing. After all, it makes showers feel great and fills pots quickly. But what most people don't realize is that water pressure that is too high can slowly damage your plumbing system and appliances.

As a master plumber, I often see homes with pressure levels that are well above what plumbing systems are designed to handle. Over time, that extra pressure can lead to leaks, burst pipes, and expensive repairs.

• Ideal Pressure Range: Most homes should have water pressure between 50–70 PSI.
• Danger Zone: Pressure above 80 PSI can start causing problems.

Understanding the risks and warning signs can help you prevent costly plumbing issues.

What Causes High Water Pressure?

High water pressure usually originates from the municipal water supply. Cities must deliver water with enough pressure to reach elevated homes and buildings, which means some homes receive more pressure than they actually need.

In other cases, pressure problems can occur due to plumbing components inside the home.

Common Causes

• Municipal supply pressure is too high
• A missing Pressure Reducing Valve (PRV)
• A failing or worn-out PRV
• Thermal expansion from water heaters

Many homes in Texas benefit from having a Pressure Reducing Valve installed where the main water line enters the house. This device keeps pressure at a safe level for your plumbing system.

Signs Your Water Pressure Is Too High

High pressure doesn't always cause immediate problems, but there are several warning signs to watch for.

Common Symptoms

• Banging or knocking pipes (water hammer)
• Frequent plumbing leaks
• Dripping faucets
• Running toilets
• Appliances wearing out quickly
• Very forceful water flow from faucets or showers

If your shower feels unusually powerful or your pipes make noise when water shuts off, your water pressure may be too high.

Why High Water Pressure Can Be Dangerous

While the effects may not show up right away, excessive water pressure places constant stress on your entire plumbing system.

Damage to Pipes

Pipes are designed to operate within a specific pressure range. When pressure is too high, it slowly weakens connections, joints, and fittings. Over time, this can lead to hidden leaks inside walls or under floors.

Shorter Lifespan for Appliances

High pressure can also damage appliances connected to your plumbing system.

These include:

• Water heaters
• Washing machines
• Dishwashers
• Ice makers
• Refrigerator water lines

Appliance manufacturers design these systems with pressure limits in mind, and excessive pressure can shorten their lifespan.

Higher Risk of Burst Pipes

In extreme cases, high pressure can lead to a burst pipe, which can cause significant water damage to your home.

Even small leaks can become expensive repairs if they go unnoticed for long periods.

How to Check Your Water Pressure

One of the simplest ways to check water pressure is with a water pressure gauge, which can be purchased at most hardware stores.

How to Test It

1. Attach the gauge to an outdoor hose bib or laundry faucet.
2. Turn on the water fully.
3. Read the PSI measurement.

If the reading is above 80 PSI, your water pressure may be too high.

A plumber can also test pressure and inspect your system to determine whether adjustments are needed.

The Solution: Installing a Pressure Reducing Valve (PRV)

The most common solution for high water pressure is installing a Pressure Reducing Valve, often called a PRV.

This device is installed where the main water line enters your home and regulates incoming pressure to a safe level.

Benefits of a PRV

• Protects pipes and plumbing fixtures
• Extends the life of appliances
• Reduces the risk of leaks
• Prevents noisy pipes and water hammer
• Creates more consistent water pressure throughout the home

If your home doesn't already have one, installing a PRV is one of the best investments you can make for your plumbing system.

Conclusion

High water pressure may seem like a good thing, but over time it can quietly cause serious damage to your plumbing system. Keeping your home's pressure within a safe range protects your pipes, appliances, and fixtures from unnecessary wear and tear.

If you suspect your water pressure is too high, it's best to have it checked before it turns into a bigger problem.

Let Us Help!

Think your home's water pressure might be too high? Lujan Plumbing can test your system and install a pressure reducing valve if needed. Give us a call today at 210-694-1325 and we'll make sure your plumbing system is running safely.