Leak Detection Services in San Antonio, TX

Leaks in your home’s plumbing can cause serious damage if left unchecked. At COR Plumbing, we provide professional leak detection services for homeowners and businesses in San Antonio, New Braunfels, Cibolo, Converse, and surrounding areas. With over 25 years of experience, our family-owned and operated plumbing company offers friendly, reliable service and Free Estimates on all leak detection and repair projects.

Common Plumbing Leaks We Detect

Leaks can appear anywhere in your home, from sinks to slab foundations.

Our expert plumbers can identify and repair:

Leaky Faucets

Dripping faucets may seem minor, but they waste water and can increase your utility bills. COR Plumbing fixes all types of faucet leaks quickly and efficiently.

Leaking Toilets

Toilet leaks can be silent and costly. Whether it’s a faulty flapper, cracked tank, or running water, we diagnose and repair toilet leaks to prevent water waste and damage.

Bathroom Remodels

When remodeling bathrooms, it’s critical to inspect existing plumbing and ensure all new fixtures—toilets, bathtubs, showers, and sinks—are installed correctly. Our team ensures all connections are leak-free and code-compliant, preventing future water damage.

Leak Detection for Slab Foundations

San Antonio homes with under-slab plumbing are especially vulnerable to leaks due to expansive clay soils that shift with seasonal moisture changes. Our plumbers use advanced leak detection tools, including:

  • Electronic leak detection equipment to find hidden leaks under slabs
  • Video camera inspections of sewer and drain lines
  • Pressure testing to pinpoint failing water lines



Early detection of slab leaks is essential to prevent foundation damage, mold growth, and costly repairs.

Sewer & Drain Leak Detection

Leaking sewer or drain lines can cause foul odors, water backups, and property damage. COR Plumbing provides thorough sewer and drain inspections, using cameras and hydro jetting as needed to locate leaks and restore proper flow.

Signs you may have a sewer or drain leak include:

  • Persistent foul odors
  • Slow or clogged drains
  • Unexplained wet spots or soggy areas in the yard
  • Bubbling or gurgling in plumbing fixtures

The Importance of Early Leak Detection

Detecting leaks early can save homeowners thousands in repairs. Benefits include:

  • Protecting your foundation and slab from water damage
  • Preventing mold and mildew growth
  • Reducing water waste and high utility bills
  • Avoiding costly emergency repairs



Our friendly, licensed plumbers at COR Plumbing are trained to detect leaks in both visible and hidden plumbing systems, ensuring your home stays safe and dry.

Why Choose COR Plumbing for Leak Detection?

Over 25 Years of Experience:  Trusted local experts in San Antonio & surrounding areas

Family-Owned & Operated: Personalized, reliable service


Friendly, Licensed Plumbers: Professional, courteous service every time


Free Estimates:

Know the cost upfront with no surprises

Service Across San Antonio & Surrounding Areas:

Faucets, toilets, showers, slab leaks, sewer and drain leaks

Call COR Plumbing Today!

Don’t wait for a small leak to turn into a major problem. Call COR Plumbing for expert leak detection and repair in San Antonio, New Braunfels, Cibolo, Converse, and beyond. Our friendly plumbers provide Free Estimates and reliable solutions for all types of plumbing leaks.