Tunnel Repair Service in San Antonio, TX

Underground Drain Line Repair in San Antonio, TX - Tunnel Access, Broken Offset & Wye Repair

When a home's drain system starts showing signs of trouble the problem isn't always visible from inside the house. Sometimes the damage is buried beneath the foundation itself, and getting to it requires precision diagnostics. That's exactly what this San Antonio job called for, and here's how we handled it from start to finish.

Step One: Pinpoint Leak Detection

Before any digging, any tunneling, or any repair work begins, you have to know exactly where the problem is. Guesswork underground is expensive and disruptive, so we started with a full pinpoint leak detection on the building drain system.

This process allows us to systematically isolate different sections of the drain line and identify precisely where failures are occurring. On this San Antonio home, the testing revealed two separate problem areas:

• A broken offset on the trunk line located beneath the front porch

• A broken 3" wye fitting on the trunk line that services the upstairs washer and master bathroom

  
  

Two breaks in two separate locations, both occurring underground. This highlights the importance of conducting thorough leak detection before undertaking any plumbing repairs. Without it, there’s a risk of overlooking a secondary failure, which could necessitate revisiting the site later.

Step Two: The Estimate and Repair Plan

With both problem areas confirmed, we put together a detailed repair plan. Access would need to be created at two points, one on the left side of the front porch to reach the broken offset, and one on the right side of the home to reach the damaged 3" wye serving the washer connection on the trunk line.

Step Three: Tunneling and Repair

With the estimate approved, we got to work. Access holes were opened at both locations, and we tunneled a total of 20 linear feet beneath the home to reach the damaged sections of pipe.

Both the broken offset and the 3" wye were cut out and replaced with Schedule 40 PVC. Once the repairs were complete, the work was inspected and passed, the tunnels were then covered and backfilled with native soil.

Dealing With Drain Line Problems Under Your San Antonio Home?

Failures in underground drain lines rank among the more severe plumbing problems a homeowner in San Antonio might encounter, but they don't have to disrupt your life completely. Utilizing the appropriate diagnostic tools and a skilled team, these repairs can be completed efficiently and accurately on the first attempt. If you notice any indications of a drain line issue in the San Antonio region, reach out to Rapid Plumbing today for a professional assessment.