A small drip under your sink may not seem like a big deal, especially if it’s just a few drops or only happens occasionally. But the truth is, even the smallest leak can lead to major problems over time. At EVERYDAYPLUMBER.com, we’ve seen firsthand how something as minor as a loose fitting or worn-out seal can escalate into costly damage.
In this guide, we’ll explain why ignoring that small leak is a mistake, what risks it poses to your home and health, and how to fix it before it’s too late.
Why Small Plumbing Leaks Shouldn’t Be Overlooked
Water is one of the most destructive forces in your home. Even a slow, steady drip under the kitchen or bathroom sink can create serious problems over time:
- Cabinet damage from constant moisture exposure
- Mold and mildew growth, which can harm indoor air quality
- Wasted water that increases your utility bills
- Hidden rot and structural damage if it spreads beyond the cabinet
- Insect or pest attraction, especially in dark, moist areas
What starts as a $5 gasket problem can easily turn into a $5,000 renovation if not caught early.
Common Causes of Under-Sink Leaks
Leaks under the sink are typically caused by:
- Loose fittings or deteriorated plumber’s putty around sink drains
- Worn-out supply line connections
- Cracked or rusted drain pipes
- Damaged P-trap connections
- Leaks from faucet hoses, soap dispensers, or water filters
While some of these are easy to fix, others can remain hidden behind cabinetry or under items stored below the sink, making them easy to miss until major damage is done.
Signs You Have a Leak (Even If You Don’t See Water)
You might not notice standing water, but watch for these warning signs:
- Warped or swollen wood inside the cabinet
- A musty or mildew-like odor
- Peeling laminate or bubbling finishes
- Small puddles that reappear after wiping
- Visible rust or mineral deposits on pipes and fittings
If you spot any of these, it’s time to take action.
What Can Happen If You Ignore It
Here’s what we often see when under-sink leaks are left unaddressed:
1. Mold Growth
Even slow drips can fuel mold and mildew. These contaminants thrive in dark, damp areas and can pose health risks. Especially for people with allergies, asthma, or respiratory conditions.
2. Cabinet and Floor Damage
Water can warp cabinets, loosen floor tiles, and damage subflooring. Once water seeps into these materials, repairs often require full replacement.
3. Structural and Electrical Risks
Leaks near garbage disposals, dishwashers, or other under-sink appliances may affect electrical components, creating a potential fire hazard.
4. Pest Infestations
Roaches, silverfish, and other pests are attracted to water sources. A small leak can provide an ideal environment for them to move in.
Leaks that affect electrical components or flooring may require emergency plumbing repairs.
What to Do if You Notice a Leak Under Your Sink
If you catch it early, the fix might be simple. Here’s what to do:
- Clear the cabinet and dry the area completely
- Inspect fittings, supply lines, and drainpipes for signs of corrosion or looseness
- Tighten loose connections and test for drips
- If damage or mold is present, or if you’re unsure of the source, call a licensed plumber
At EVERYDAYPLUMBER.com, our Tampa plumbing professionals provide fast, affordable leak detection and leak repair to protect your home and health.
FAQ: Under-Sink Leaks
Q: Is a small leak under my sink really an emergency?
A: It may not be urgent, but it should never be ignored. Small leaks often indicate larger plumbing problems and can cause hidden damage quickly.
Q: Can I fix a leak under my sink myself?
A: Sometimes, yes, especially if it’s just a loose connection. But if you see corrosion, mold, or water stains, it’s best to have a professional inspect it.
Q: How can I prevent leaks under the sink in the future?
A: Avoid over-tightening fittings, check for leaks regularly, and don’t overload your cabinet with heavy or sharp objects that can bump plumbing lines.
Q: What if I smell mildew but don’t see water?
A: That’s often a sign of a slow or hidden leak. Mold and mildew odors indicate moisture, even if it hasn’t pooled. Call a licensed plumber to investigate.
Don’t Ignore That Leak – Call Tampa’s Trusted Plumbers Today
If you’ve noticed water under your sink, or even just the smell of mildew. Don’t wait for it to turn into a costly repair. At EVERYDAYPLUMBER.com, we specialize in fast, affordable leak detection and under-sink plumbing repairs across Tampa, St. Pete, Wesley Chapel, and the entire Tampa Bay Area.
📞 Call 813-872-0200 or request an appointment on our website today. We’ll find the source of your leaks, fix it right, and help prevent future damage. All with honest, affordable pricing and guaranteed results.
Let our family serve yours. We’re committed to dependable results and guaranteed satisfaction.
Check out our 5-star reviews on our Google Business Profile. Discover why we’re one of the most trusted plumbing companies in the Tampa Bay Area.
