When the Water Just Trickles Out
There's nothing more frustrating than stepping into the shower and getting a weak drizzle instead of a satisfying stream. Low water pressure affects your whole experience of your home — showers take forever, faucets fill slowly, and appliances like dishwashers and washing machines don't clean as well.
But low water pressure isn't just an annoyance. It can be a symptom of a bigger problem in your plumbing system. Here's how to figure out what's causing it and what to do.
First: Is It One Fixture or the Whole House?
This is the most important diagnostic question.
If it's just one faucet or shower: The problem is localized to that fixture. It's likely a clogged aerator or showerhead.
If it's the whole house: The problem is in your main supply line, pressure regulator, or somewhere in your plumbing system. This needs more investigation.
Cause 1: Clogged Aerator or Showerhead (One Fixture)
The aerator is the small screen at the tip of your faucet. Over time, mineral deposits — especially common with East Texas water — build up on the screen and restrict flow. The same thing happens to showerheads.
How to fix: Unscrew the aerator (by hand or with pliers wrapped in a rag to avoid scratching), soak it in vinegar overnight to dissolve the minerals, scrub it with an old toothbrush, and reattach. For a showerhead, you can do the same or just fill a plastic bag with vinegar, tie it around the showerhead, and let it soak.
Cause 2: Pressure Regulator Problem (Whole House)
Many homes have a pressure regulator on the main water line where it enters the house. This valve reduces the pressure from the city water supply to a safe level for your home. If it fails — either getting stuck or wearing out — it can cause a sudden drop in pressure throughout the house.
How to check: You can buy a pressure gauge that screws onto an outdoor spigot for about $10. Normal household water pressure is between 40 and 60 psi. If yours is well below that, your regulator may be the problem.
What to do: A pressure regulator replacement is a job for a plumber. It's not expensive, but it involves cutting into the main water line.
Cause 3: Hidden Leak (Whole House)
If you have a leak in your main supply line — between the meter and the house, or inside the walls — you'll lose pressure throughout the house. This is one of the more serious causes of low pressure, because that leaking water is going somewhere it shouldn't be.
How to check: Turn off all water in the house and check the meter. If it's still moving, you have a leak. See our article on hidden water leak signs for more details.
Cause 4: Pipe Corrosion or Buildup (Whole House)
If your home has older galvanized steel pipes, they can corrode from the inside over decades, narrowing the pipe and restricting flow. This is a gradual process — you may notice pressure slowly declining over years rather than suddenly. It's common in homes built before the 1970s.
What to do: Unfortunately, the only real fix for corroded pipes is replacement. If your home has galvanized pipes and you're experiencing declining pressure, it may be time to consider repiping — at least the affected sections.
Cause 5: City Water Issues (Whole House)
Sometimes the problem isn't your home at all — it's the city water supply. Construction, water main breaks, or maintenance in your area can temporarily lower pressure. If your neighbors are also experiencing low pressure, this is likely the cause. Check with your local water utility.
When to Call a Plumber
If you've cleaned your aerators and the pressure is still low throughout the house, it's time to call a professional. Low pressure can indicate a leak that's quietly damaging your home, or a failing component that will only get worse. At All American Plumbing, we serve Brownsboro, Chandler, Murchison, Eustace, Athens, Tyler, and the surrounding East Texas area. We'll diagnose the real cause of your low pressure and give you an honest recommendation — no unnecessary work, no surprises.
