How to Determine If You Have a Hidden Plumbing Leak

Water leaks are more than just an inconvenience—they can lead to serious damage to your home and belongings if left unchecked. While visible leaks like dripping faucets are easy to spot, hidden plumbing leaks can be much trickier to detect. Fortunately, there are several ways to uncover these sneaky leaks before they turn into a major problem. Here’s how you can identify a hidden plumbing leak in your home.


1. Conduct a Water Meter Test

One of the most reliable ways to detect a hidden leak is by checking your water meter. Start by turning off all faucets and water-using appliances in your home. Then, check your water meter reading. If the meter continues to move, even when no water is running, you likely have a hidden leak. For slow leaks, take another reading after a few hours and compare the results.


2. Test Your Water Pressure

A sudden drop in water pressure can indicate a plumbing leak. If you’ve noticed weaker water flow from faucets or showerheads without an obvious cause, you may have a hidden leak somewhere in your plumbing system. A professional plumber can help pinpoint the issue if the pressure continues to drop.


3. Listen for Unusual Sounds

Even if you can’t see water, you may be able to hear it. If you notice a faint sound of running or dripping water behind walls, under floors, or in ceilings, it’s a strong sign of a hidden leak. These sounds are often more noticeable at night when the house is quiet.


4. Inspect Your Appliances

Household appliances like dishwashers, refrigerators, and washing machines are common culprits for leaks. Check underneath and behind these appliances for any signs of moisture or puddles. If you find a leak, it’s important to address it quickly before it leads to bigger water damage.


5. Test Your Toilets

Toilets are another common source of hidden leaks. An easy test is to drop a few drops of food coloring into the toilet tank before going to bed. If you find the color in the toilet bowl by morning without flushing, you have a leak that needs repair.


6. Monitor Your Water Bill

A sudden spike in your water bill without a change in usage can indicate an undetected leak. If your bill is consistently higher than normal, it’s worth investigating further by performing some of the above tests.


7. Look for Dampness and Water Stains

If you start noticing wet spots, water stains, or discoloration on your walls, ceilings, or floors, these could be warning signs of a leak. Over time, hidden leaks can also lead to mold and mildew growth, causing musty odors and potential health hazards.



A plumber is fixing a leaking sink pipe with a wrench.


How to Fix Common Household Leaks


If you discover a leak, addressing it quickly can prevent further damage. Here’s how to tackle some of the most common plumbing leaks:


Fixing a Dripping Faucet

Dripping taps are usually caused by a worn-out washer or debris buildup. Turn off the water supply, disassemble the faucet, clean any debris, and replace the washer if needed. If the issue persists, consider replacing the faucet.


Repairing a Leaking Pipe

For minor leaks, using waterproof tape or epoxy can provide a temporary fix until a plumber can replace the affected pipe. If the leak is severe, turn off the water supply and call a professional immediately.


Sealing a Leaky Toilet Base

If water is pooling around the base of your toilet, it’s likely due to a damaged wax ring or loose bolts. Replacing the wax ring and tightening the bolts can usually resolve the problem.


Stopping a Showerhead Leak

A leaky showerhead can often be fixed by tightening connections or replacing the cartridge. If water is still leaking after these fixes, you may need to replace the showerhead itself.



A man is fixing a sink with a screwdriver.

When to Call a Professional


If you’ve tried these methods and still suspect a hidden leak, it’s time to call in a professional plumber. At Riverway Plumbing, we specialize in leak detection and repair to help protect your home from costly water damage. Whether it’s a hidden pipe leak or an emergency plumbing issue, our experts are ready to assist.


Don’t let a hidden leak cause major damage—contact Riverway Plumbing today at (812) 327-8080 for fast, reliable service!

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