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Slab leak signs and the water meter test

Most homes here sit on concrete slabs with water lines running underneath. A small leak below the slab can go unnoticed for weeks.

Warning signs

• A warm spot on a tile or wood floor (hot-water line)
• The sound of running water when everything is off
• A water bill that jumps without explanation
• Damp carpet, warped flooring or cracks with moisture
• Low water pressure or a water heater that runs constantly

The water meter test

1. Turn off every faucet, appliance and the irrigation system.
2. Find your meter (usually in a box near the curb) and note the reading or watch the small leak indicator.
3. Wait 30–60 minutes without using any water.
4. If the reading changed or the indicator moved, water is leaking somewhere.

A plumber with leak detection equipment can pinpoint the spot. If water has already damaged floors or walls, a restoration company handles drying and mold prevention.