Most homeowners like strong water pressure. A powerful shower feels good, and sinks fill faster. But there is a difference between good water flow and pressure that is too high for the plumbing system.
When water pressure gets too high, it can quietly wear out fixtures, damage appliances, shorten the life of a water heater, and increase the chance of leaks. In just the past few months, I've measured water pressure over 120 PSI in several homes throughout Franklin County and the surrounding area. In some of those homes, the excessive pressure had already damaged plumbing fixtures and equipment.
Plain English: high water pressure is like overinflating a tire. It may work for a while, but everything connected to it is under extra stress.
What Is Normal Water Pressure?
Most homes operate best between 40 and 60 PSI. Some homes may run a little higher or lower and still work fine, but once pressure gets above 80 PSI, it can begin placing unnecessary stress on the plumbing system, fixtures, and appliances.
High pressure does not always cause an immediate emergency. That is part of the problem. It may slowly wear down parts for months or years before something finally leaks, bursts, or fails.
Common Signs Your Water Pressure May Be Too High
You may have high water pressure if you notice:
- Faucets spraying harder than normal
- Toilets that run or need frequent fill valve repairs
- Banging, hammering, or vibrating pipes
- Water heater relief valve dripping
- Washing machine hoses bulging or failing
- Faucets, cartridges, and shutoff valves leaking sooner than expected
- Water softener or filter problems
- A water bill that suddenly seems too high
One of those signs by itself does not always prove high pressure, but it is enough reason to check it.
What Can High Water Pressure Damage?
Water Heaters
Your water heater is already dealing with heat, expansion, and pressure. When the incoming water pressure is too high, the tank and safety components are under more stress. This can lead to dripping relief valves, expansion tank issues, and a shorter water heater lifespan.
Faucets and Shower Valves
Faucets, cartridges, washers, O-rings, and shower valves are not made to be hammered with excessive pressure every day. High pressure can make small parts fail faster and turn a simple fixture into a recurring repair.
Toilets
Toilet fill valves can wear out faster when pressure is too high. That can lead to toilets that run, make noise, refill randomly, or waste water without the homeowner realizing it.
Appliance Hoses
Washing machine hoses, dishwasher connections, ice maker lines, and other small supply lines are vulnerable when pressure is excessive. A failed hose can create a lot of water damage in a short amount of time.
Water Softeners and Filters
Water treatment equipment has seals, valves, and internal parts that are designed to operate within a normal pressure range. High pressure can shorten the life of those parts and make leaks more likely.
What Causes High Water Pressure?
Sometimes the problem comes from the city or public water system. Depending on elevation, neighborhood layout, and the way the water system is supplied, one home may receive much higher pressure than another.
Other times the issue is a failed or missing pressure reducing valve, often called a PRV. A PRV is installed on the main water line and reduces incoming pressure before it reaches the plumbing inside the house.
PRVs do not last forever. When they fail, the house may slowly creep back up to full street pressure without the homeowner knowing it.
How Do You Fix High Water Pressure?
The first step is simple: test the pressure. A pressure gauge can be connected to a hose faucet, laundry connection, or another threaded connection to see what the home is actually receiving.
If the pressure is too high, the solution is usually one of two things:
- Adjust the existing PRV if it is still working properly.
- Replace or install a PRV if the old one has failed or the home does not have one.
After that, the pressure should be set to a safe level that protects the plumbing while still giving the home strong, usable water flow.
Important: if your home has a PRV, it may also need a properly sized thermal expansion tank on the water heater. A closed plumbing system needs somewhere for heated water to expand.
Can You Check Water Pressure Yourself?
Yes. A basic water pressure gauge is inexpensive and can give you a quick reading. The part homeowners often miss is that pressure can change throughout the day. It may look acceptable once and spike higher later.
If you are seeing repeated fixture problems, leaking relief valves, failed shutoffs, or noisy pipes, it is worth having the system checked by someone who knows what they are looking at.
Protect the Plumbing Before Something Fails
High water pressure is one of those problems that is easy to ignore because everything seems to work fine at first. But behind the walls, under sinks, and inside appliances, that extra pressure is constantly pushing on parts that were not made to take it forever.
If you live in Franklin County, Jefferson County, Warren County, or western St. Charles County and you are concerned about high water pressure, Posey Family Plumbing can test your pressure, inspect your PRV, and help protect your home from unnecessary plumbing damage.
Need Your Water Pressure Checked?
If your faucets are spraying hard, toilets keep acting up, pipes are banging, or your water heater relief valve is dripping, it may be time to check the pressure. Call or text Brian directly at (314) 620-4809.