Why Is My Water Pressure Low? Common Causes And What To Do About It
If you’ve noticed the water pressure in your kitchen or bathroom isn’t what it used to be, you’re not alone. Low water pressure is a common plumbing issue—but it’s not always caused by the same thing. At Niebuhr Plumbing, Heating, and Air Conditioning, we help homeowners in the La Crosse area figure out what’s behind the drop in pressure and whether it’s a quick fix or a sign of something bigger. Here’s are some low water pressure causes —and how to tell if it’s time for repair or replacement.
Start With The Simple Fixes
Clogged Aerators
If the pressure is low at just one faucet, a clogged aerator is the most likely culprit. Over time, mineral deposits and debris can collect in the screen at the tip of your faucet.
What to do:
Unscrew the aerator, rinse it, and soak it in vinegar to dissolve buildup. This is an easy DIY fix that can quickly restore full pressure.
Widespread Low Pressure? Check For These Common Issues
Sediment Buildup In Pipes Or Fixtures
Over time, minerals from hard water can settle in your plumbing system, narrowing the interior of your pipes and restricting flow. Sediment can also collect in valves or inside fixtures, especially in older homes.
When to act:
If multiple fixtures are affected and cleaning the aerator doesn’t help, it’s time to call a plumber. Professional pipe cleaning or fixture replacement may be needed.
Failing Mixing Valves
Your faucet or shower may have a thermostatic mixing valve that controls the blend of hot and cold water. When these valves malfunction, they can throw off the balance—making your water feel too cold, too hot, or weak in pressure.
When to act:
If water pressure is low only when using hot water, the mixing valve could be the issue. These can often be replaced without major work.
Aging Water Heater
Sediment in your water heater tank can settle and harden over time, reducing its efficiency and restricting the flow of hot water. If you’ve noticed lower pressure only from hot taps, especially in the shower, your water heater could be the problem.
When to act:
Have your tank flushed if it’s under 10 years old. If it’s over 10–12 years and you’re still having issues, replacement might be the smarter move
Homes With Wells
If you get your water from a private well, low pressure could be tied to your well pump, pressure tank, or other components of the system. This isn’t something your plumber can fix—well equipment must be inspected and serviced by a licensed well company.
When to act:
If you’re on a well and notice a drop in pressure throughout your home, contact a trusted well service provider to assess your system.
When It’s More Than Just A Fixture
Corroded Or Outdated Plumbing
In some older homes, galvanized steel pipes corrode from the inside out. The result? Steadily decreasing pressure across your plumbing system.
When to act:
If your home has older pipes and you’ve tried all the simple fixes, you may need to consider replacing sections of the plumbing to restore normal flow.
Water Supply Issues Or Leaks
In some cases, the issue is beyond your fixtures. A leak in your main line, a faulty pressure-reducing valve, or issues with your municipal water supply can all reduce water pressure.
When to act:
If you suspect a leak (wet spots, unusually high water bills, etc.), call a plumber right away. These are not DIY problems and can worsen quickly.
Know When To Call The Pros
If your water pressure has dropped suddenly or continues to decline over time, it’s best to get it checked out. Some issues—like a dirty aerator—are easy to fix. But others, like sediment buildup or outdated piping, need a professional eye.
At Niebuhr, we’ve seen it all. Whether it’s a minor fix or a full fixture replacement, we’ll help you get your water pressure back to normal—quickly and efficiently.
Call 608-782-1700 or request a service online today.
