Low Water Pressure in Your Bathroom Sink? Here’s What’s Really Causing It (South Florida Guide)

If you’re dealing with low water pressure in your bathroom sink, it can make everyday tasks frustrating, washing your hands, brushing your teeth, or cleaning the sink takes longer than it should.
In many South Florida homes, this problem isn’t caused by city water pressure at all. It’s usually a localized plumbing issue inside the faucet, supply lines, or pipes feeding the bathroom.
Let’s break down the real causes and what to do next.
1. Clogged Faucet Aerator (Most Common Cause)
The aerator is the small screen at the tip of your faucet.
Over time, it traps:
- mineral deposits
- sand particles
- debris
- rust flakes
South Florida’s mineral-heavy water clogs aerators quickly.
Quick test:
Unscrew the aerator and run the faucet.
If pressure improves instantly → aerator was the issue.
2. Mineral Buildup Inside the Faucet
Even if the aerator is clean, minerals can clog:
- internal faucet cartridges
- valves inside the faucet body
This reduces pressure even when the rest of the house is fine.
This is common in older or cheaper faucets.
3. Partially Closed Shutoff Valves
Under your sink are two small shutoff valves (hot and cold).
If one is:
- partially closed
- corroded internally
- failing
…it restricts water flow to the faucet.
Gate-style valves in older Florida homes are especially prone to this.
4. Low Pressure Only on Hot or Cold
This detail matters.
- Low hot water only → water heater, hot line, or sediment issue
- Low cold water only → cold supply line or valve restriction
Testing hot vs cold helps pinpoint the source.
5. Supply Line Blockage
Flexible supply lines can clog internally from:
- mineral scale
- rubber liner breakdown
- sediment
This causes reduced pressure even when valves are fully open.
6. Corroded Pipes Feeding the Bathroom
In older South Florida homes, bathroom sinks are often fed by:
- older copper
- galvanized steel
Over time, corrosion narrows the pipe diameter, reducing pressure at that fixture only.
7. Pressure Is Fine Elsewhere
If:
- shower pressure is good
- kitchen sink is strong
- other bathrooms are normal
…the issue is almost certainly localized, not a whole-house pressure problem.
8. DIY Checks You Can Safely Do
✔ remove and clean aerator
✔ test hot vs cold pressure
✔ check shutoff valves under sink
✔ inspect supply lines for kinks
✔ run faucet without aerator
If pressure doesn’t improve → deeper issue exists.
9. Why Chemical Cleaners Don’t Help
Drain cleaners don’t improve water pressure.
They:
- don’t clear supply restrictions
- damage older pipes
- corrode faucet parts
Low pressure is a supply-side issue, not a drain problem.
10. When to Call a Plumber
Call a professional if:
- pressure stays low after cleaning aerator
- valves won’t open fully
- pressure drops suddenly
- faucet is older
- corrosion is visible
- multiple bathroom sinks affected
These usually require part replacement or pipe inspection.
11. What We Do (Professional Fix)
At Leading Plumbing Services, we:
- clean or replace aerators
- test faucet cartridges
- replace failing shutoff valves
- inspect supply lines
- check for pipe corrosion
- restore proper flow safely
We fix the root cause , not just the symptom.
12. South Florida-Specific Reality
South Florida plumbing systems face:
- mineral-heavy water
- faster corrosion
- older fixtures
- sediment intrusion
That’s why low bathroom sink pressure is so common here.
Final Thoughts
If you have low water pressure in your bathroom sink, the issue is usually close to the faucet , not the city supply.
Fixing it early:
- restores convenience
- prevents valve failure
- avoids pipe damage
- improves daily use
Call/Text us today for bathroom sink pressure inspection:
(561) 506-6159





