How to Find a Water Leak: 5 Tips Before You Call a Plumber

A hidden leak in a Torrance home rarely announces itself the way a burst pipe does — it usually shows up first as a strange water bill or a damp patch that doesn't quite make sense. Here's how to narrow it down before calling in electronic detection equipment.

1. Check the Water Meter

Turn off every fixture and appliance, then watch the small leak indicator on the meter face for a minute or two. If it's moving with nothing running, water is escaping somewhere on your side of the meter.

2. Track Your Water Bill

Compare the last two or three months. A steady, unexplained climb with no change in household usage is one of the most reliable leak signals there is.

3. Feel for Warm Spots on the Floor

If your hot water line runs under a slab, a warm patch on tile or laminate flooring — especially one that doesn't match a nearby heat source — often points to a slab leak.

4. Listen for Running Water

With everything off, walk the house and listen near walls and floors. A faint hiss or trickle sound with no fixtures running means water is moving somewhere it shouldn't be.

5. Inspect the Yard and Foundation

Look for a patch of grass that's greener or always damp compared to the rest of the yard, water pooling near the foundation, or soft, sinking ground — all signs of an underground leak in the service line.

What You Can't Do on Your Own

These checks can tell you a leak exists and roughly where to look, but pinpointing the exact spot behind a wall or under a slab needs electronic equipment — acoustic listening devices and thermal imaging — so nobody has to guess where to cut or dig. See our leak detection page for same-day service anywhere in Torrance.

Reviewed by the Rush Plumber team — licensed, insured plumbers serving Torrance, CA and the South Bay, 3610 Torrance Blvd, Torrance, CA 90503. Call (209) 860-5004, 24/7.