Pipes
Pinhole Leaks in Copper Pipes: Signs, Causes and What Arlington Homeowners Can Do
Tiny holes in copper water lines can leak for weeks before you notice. Signs, causes and next steps.
Hidden Leaks
The hoses that feed your fridge, washer and dishwasher are small, but they hold full water pressure all day. Here is how to check them.
Your fridge, washer and dishwasher are hooked to water lines that stay under pressure all the time. A worn hose, a loose fitting or a cracked valve can leak behind or under the appliance where you cannot see it. The water soaks into the cabinet, the floor or the slab edge. Checking these lines takes a few minutes and can save a big repair. If you find damage and cannot see where the water comes from, call (817) 285-5426 for leak detection.
Look for a damp or warped floor near the appliance, swollen cabinet bottoms beside the dishwasher, a musty smell in the kitchen or laundry room, water stains on the ceiling below a second-floor laundry, and a water meter that moves when nothing is running. A fridge with a weak water dispenser or a small ice maker output can also point to a supply leak.
Our guide to the musty smell of a hidden leak explains why odors often come before stains.
Rubber washing machine hoses are the most common cause. They harden and crack with age. Thin plastic ice maker lines behind fridges can split or get pinched when the fridge is pushed back. Dishwasher supply lines and drain hoses can leak at the fittings under the sink. Old saddle valves on copper lines are another weak spot.
| Appliance | Common leak point |
|---|---|
| Washing machine | Rubber fill hoses, hose washers, wall valves |
| Refrigerator | Plastic ice maker line, saddle valve, inlet valve |
| Dishwasher | Supply line at the valve, drain hose clamp |
| Water heater | Supply connectors, relief valve, tank |
For water heater leaks, see our water heater leak guide.
Think you have a leak? A licensed Arlington technician answers 24/7.
Call Now (817) 285-5426Pull the appliance out with care, look at each hose and fitting with a flashlight, and feel for damp spots. Check the shut-off valves turn easily. Replace rubber washer hoses with braided steel ones every five years or so. Then do a meter test to make sure there are no other leaks in the house.
Find your main valve before you need it with our main shut-off valve guide. A water leak detector on the floor behind each appliance can warn you early.
The leak may be inside the wall, in the supply pipe behind the valve, or in a drain line. In homes on a slab, a wet floor near a kitchen or laundry can also mean a slab leak. A meter test, a moisture meter and a thermal camera help find the true source.
Read our guides to a leak in a wall or ceiling and slab leak signs, or book slab leak detection.
A basic leak detection visit in Arlington usually costs $150 to $400. If the leak is under the slab, slab leak detection runs about $250 to $600. You get the price before work starts.
| Service | Typical cost |
|---|---|
| Basic leak detection | $150 – $400 |
| Slab leak detection | $250 – $600 |
| Sewer camera inspection | $150 – $400 |
General estimates for Arlington, TX in 2026. Your exact price is confirmed before any work begins.
Many makers suggest every five years. Braided steel hoses last longer than plain rubber, but check them once a year either way.
Yes. The thin line behind the fridge can crack, split or come loose at the valve. A drop in ice output can be an early sign.
It is a good idea. Turning off the washer valves, or the main, lowers the risk of a hose bursting while no one is home.
Usually, yes. Moisture meters and thermal cameras show where water is spreading so only a small area needs to be opened.
Pipes
Tiny holes in copper water lines can leak for weeks before you notice. Signs, causes and next steps.
Hidden Leaks
A clogged AC drain can look just like a pipe leak. How to tell them apart and what to do first.
Prevention
Leak sensors and smart shut-off valves can catch leaks early. How they work, where to put them and their limits.
Arlington Leak Pros finds hidden slab, water line, pool and wall leaks without tearing up your home. Open 24/7.
(817) 285-5426