Tunnel Plumbing in San Antonio, TX

When it comes to plumbing issues beneath your home, traditional repair methods can be costly, disruptive, and time-consuming. That’s why homeowners in San Antonio, New Braunfels, Cibolo, Converse, and surrounding areas trust COR Plumbing for tunnel plumbing services. With over 25 years of experience, our family-owned and operated plumbing company delivers friendly, professional service and Free Estimates for all under-slab plumbing needs.

What is Tunnel Plumbing?

Tunnel plumbing is a specialized technique used to access and repair pipes located under your home’s foundation or slab without requiring major demolition. Instead of breaking up concrete floors, our experienced plumbers carefully create a tunnel under the slab to reach damaged pipes. Once repairs or replacements are completed, the tunnel is safely backfilled, leaving your home largely intact.

This method is ideal for:

  • Slab leaks
  • Sewer line repairs under the foundation
  • Drain line replacements
  • Hard-to-access plumbing problems

Why Tunnel Plumbing is Popular in San Antonio

San Antonio homes often feature under-slab plumbing systems, which are prone to issues due to local soil conditions. The region’s expansive clay soils expand and contract with seasonal moisture changes, placing stress on pipes beneath the slab. Over time, this can lead to:

  • Cracks or breaks in water lines
  • Leaks and water damage
  • Sewer line blockages or corrosion



Because replacing or repairing these pipes traditionally requires breaking up concrete slabs, tunnel plumbing has become the preferred solution. It’s less invasive, faster, and more cost-effective, making it ideal for homeowners who want to protect their home while addressing plumbing issues quickly.

Address Plumbing Issues Now to Prevent Foundation Damage

Ignoring leaks or damaged under-slab pipes can lead to serious problems, including:

  • Water seeping into the foundation
  • Structural damage from soil erosion
  • Mold growth and indoor air quality concerns
  • Increased repair costs over time



The San Antonio area is particularly susceptible due to fluctuating soil moisture levels, which can shift and settle around foundation slabs. Prompt tunnel plumbing repairs prevent these issues from escalating, protecting both your home and your family.

Why Choose COR Plumbing for Tunnel Plumbing?

Over 25 Years of Experience: Decades of hands-on expertise with water heaters of all types

Family-Owned & Operated: Personalized, reliable service


Friendly, Licensed Plumbers: Professional, courteous, and skilled


Free Estimates:

Know the cost upfront with no surprises

Service Across San Antonio & Surrounding Areas:

Tunnel plumbing, leak detection, and pipe replacement

Call COR Plumbing Today!

Don’t wait until a small leak under your slab becomes a major problem. Call COR Plumbing for expert tunnel plumbing services in San Antonio, New Braunfels, Cibolo, Converse, and beyond. Our friendly plumbers provide Free Estimates and long-lasting solutions to protect your home and foundation.