A sudden spike in your water bill can leave you scratching your head—and your wallet hurting. If you haven’t dramatically increased your water usage, and there are no obvious signs of trouble, it’s easy to feel frustrated and confused. So, what gives?
At At Your Service Plumbing and Drain Cleaning, we’ve helped countless homeowners across Murrells Inlet, Myrtle Beach, and the Grand Strand get to the bottom of this common question:
“Why is my water bill so high?”
In many cases, the culprit is a hidden plumbing leak—a silent issue that can waste hundreds (even thousands) of gallons of water a month without you knowing. In this blog, we’ll walk you through the most common hidden plumbing problems, how to detect them, and what to do next.
The Shocking Truth About Hidden Leaks
The EPA estimates that household leaks waste nearly 1 trillion gallons of water annually in the U.S. That’s not just bad for the environment—it’s bad for your wallet.
Even a small leak—like a dripping faucet or a running toilet—can add $20 to $100+ per month to your bill if left unchecked. And hidden leaks that occur behind walls, under floors, or in crawl spaces can go unnoticed for months, racking up costs and causing long-term damage to your home.
Signs You May Have a Hidden Plumbing Leak
Not sure if a leak is to blame for your high water bill? Watch for these common warning signs:
🚰 Unexplained spike in your water bill
💧 Sound of running water when no fixtures are in use
🧱 Wet spots on walls, ceilings, or floors
🦠 Mold or mildew in unusual places
📉 Drop in water pressure
🏡 Damp or mushy areas in your yard
🔄 Water meter running when everything is turned off
If you’ve checked your usage and nothing has changed, it’s time to start thinking about what’s going on behind the scenes.
Top Hidden Plumbing Leaks That Increase Your Water Bill
Let’s break down the most common causes of hidden water leaks in homes along the South Carolina coast.
1. Running Toilets
A running toilet is one of the biggest water wasters in any home. It might not seem like a big deal, but it can waste up to 200 gallons of water a day—adding hundreds to your monthly bill.
Often caused by:
Worn flapper valve
Improper float height
Faulty fill valve
Try placing a few drops of food coloring in the toilet tank. If it seeps into the bowl within 30 minutes without flushing, you’ve got a leak.
2. Leaking Faucets and Fixtures
Drip… drip… drip. That tiny sound can equal 3,000+ gallons of wasted water per year. And if the leak is hot water? You’re also paying to heat water you never use.
Worn washers, corroded valve seats, or aging seals are often to blame—issues easily handled by a professional plumber.
3. Slab Leaks
Slab leaks occur in the water lines that run under the concrete foundation of your home. They’re serious, because they can go unnoticed for months while causing structural damage.
Signs of a slab leak include:
Warm or damp spots on your floor
Sudden cracks in walls or flooring
Unexplained increase in your water bill
Sound of water running under the house
Slab leaks require prompt attention from a licensed plumber—this is not a DIY fix.
4. Irrigation and Outdoor Plumbing Leaks
Irrigation systems are notorious for hidden leaks—especially after a storm, freezing temps, or lawn equipment damage. A broken sprinkler head or cracked underground pipe can leak thousands of gallons before you’re even aware.
Outdoor faucets (hose bibs) may also drip or leak behind the wall where you can’t see.
5. Leaky Water Heaters
Water heaters, especially in coastal South Carolina, can corrode over time due to salt air and humidity. A leak may not be visible if it’s occurring slowly from the bottom of the tank or from a connection pipe.
Listen for hissing, inspect around the base, and check your utility bills. If your water heater is 8+ years old and your bill is creeping up, it might be the source.
6. Hidden Pipe Leaks Inside Walls or Ceilings
This is where things get tricky. Pipes behind walls, under floors, or in the attic can slowly leak due to:
Pipe corrosion (common in older homes)
Poor installation
High water pressure
Earth shifting or settling foundation
These leaks can stay hidden for months until they cause visible water damage—or a massive spike in your water bill.
How to Check for Hidden Plumbing Leaks at Home
Before calling a plumber, there are a few steps you can take to investigate:
✅ Check Your Water Meter
Turn off all water-using appliances and fixtures.
Locate your water meter and note the reading.
Wait 1-2 hours without using any water.
If the meter changes, you’ve got a leak.
✅ Inspect Toilets and Faucets
Look for silent toilet running and slow-dripping faucets—these are easy DIY fixes or quick service calls.
✅ Walk Your Property
Check your yard for overly green patches, soft spots, or unexpected wet areas—these can signal an underground leak.
Still unsure? That’s where At Your Service Plumbing and Drain Cleaning comes in.
Professional Leak Detection Services in Murrells Inlet & Myrtle Beach
At At Your Service Plumbing, we use advanced leak detection tools to pinpoint hidden plumbing leaks quickly and accurately, without tearing up your home. Our team is trained to find and fix:
Slab leaks
Underground pipe leaks
Leaks behind walls or under flooring
Irrigation and outdoor fixture leaks
Whole-house plumbing inefficiencies
We service residential and commercial properties across Murrells Inlet, Myrtle Beach, Garden City, Surfside Beach, and surrounding areas—and we know exactly what issues coastal homes face.
Preventing Hidden Leaks in the Future
To avoid surprise water bills and water damage, consider the following preventive tips:
🛠 Schedule Annual Plumbing Inspections
Regular inspections catch small leaks before they become big problems. Our team can evaluate your entire system—including water pressure, valves, and water heater performance.
💧 Monitor Your Water Usage
Install a smart leak detection system or water usage monitor to alert you in real-time if unusual water activity is detected.
🌊 Consider Water Pressure Regulators
Too much water pressure can stress your pipes and increase the chance of leaks. We’ll make sure your system is properly balanced.
🧼 Replace Aging Fixtures and Appliances
Old fixtures, pipes, and appliances are more likely to leak. We can help you upgrade efficiently.
High Water Bill? We’re At Your Service.
If your water bill doesn’t match your water habits, don’t ignore it. Even if you don’t see or hear a leak, it doesn’t mean one isn’t silently costing you money.
At Your Service Plumbing and Drain Cleaning is here to help you track down hidden leaks and keep your plumbing system running efficiently. From pinpoint leak detection to complete repairs, we treat your home like it’s our own—with honesty, experience, and care.
📞 Call us at 843.380.8556
🌐 Schedule online at atyourserviceplumbingmb.com
✅ Licensed, Insured, and Always At Your Service
