Slab Leak Guide

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Updated 27 October 2026

This site gives general information about home plumbing. It is not professional advice and can't diagnose your home — only an on-site inspection can.

Prices we show are ranges from cited sources. Your quote may be higher or lower.

Any provider you contact is independent from us; verify license and insurance before hiring.

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When to call a licensed plumber

Water spreading across a floor, a warm spot on a slab floor, a leaking water heater, or sewage backing up into a drain needs a licensed plumber. Keep away from water near outlets or appliances, and shut off the water at the main valve only if you can reach it safely. If you smell gas near a gas water heater, leave the house and call your gas utility or 911 from outside. Never plug or cap a water heater's relief valve. Before anyone digs in your yard, call 811.