03/25/2026
Why That’s a Problem Wednesday: High Water Pressure
Water pressure that’s too high might feel great at the faucet… but it can cause problems throughout the plumbing system.
Most residential systems are designed to operate between 40–80 PSI. The International Residential Code (IRC) states that water pressure should not exceed 80 PSI, and if it does, a pressure reducing valve (PRV) is required.
📊 What this means:
When pressure is too high, it puts added stress on the entire system—not just one fixture.
🚿 Why it matters:
High water pressure can:
● Wear out fixtures like faucets, toilets, and valves
● Increase the likelihood of leaks at connections
● Shorten the lifespan of appliances such as water heaters, dishwashers, and washing machines
Over time, that extra pressure can lead to premature failure of plumbing components.
👀 How to identify it:
● Water flow feels unusually strong
● Banging or knocking sounds in pipes (water hammer)
● Frequent fixture leaks or repairs
● Pressure can be tested using a simple gauge at a hose connection
🏷️ What this can affect:
Water heaters, fixtures, valves, supply lines, and appliances are designed for normal residential water pressure. Even though a water heater may have a 150 PSI temperature and pressure relief valve, that is a safety limit—not a normal operating target. Consistently high pressure can increase wear on seals, fittings, valves, and appliance components over time.
🔧 What to do next:
If pressure is above 80 PSI, have a licensed plumbing contractor evaluate the system. A pressure reducing valve (PRV) may need to be installed or adjusted to bring the system within an acceptable range.
