Sewer Line Replacement Under a Home in The Colony, TX

Written by Steven Shipler, Texas Licensed Master Plumber, Responsible Master Plumber (RMP), MBA, and host of The 4 Guys Education on YouTube.

We had to replace the sewer line under a home in The Colony, Texas. The house looked fine above the surface. The floors were solid, the toilets flushed, and nothing screamed emergency. But underneath the slab, the drain line was failing, and the only honest way to prove it and fix it was to get below the concrete and rebuild the line the right way.

This is a real example of why we camera inspect before we ever cut concrete, and why an under-slab sewer replacement is a drainage decision, not just a pipe swap.

The Job: Replacing a Failed Sewer Line Below the Slab

This sewer line replacement was performed at a home in The Colony, TX. The work involved tunneling under the foundation to reach the failed drain line, removing the damaged pipe, and installing a new sewer line with proper slope back to the fixtures it serves. In North Texas, especially around The Colony, Frisco, and Plano, expansive clay soil and foundation movement put real stress on sewer piping below the slab.

What We Found Under the Slab

Once we opened the tunnel and reached the line, the condition of the old pipe was clear. This is the kind of thing a homeowner never sees, and exactly why a camera inspection matters before approving work:

• Old drain pipe that had separated and broken, no longer carrying flow the way it should.
• Root intrusion working through the soil toward the moisture inside the line.
• Signs of poor slope, where wastewater was sitting instead of draining cleanly by gravity.
• A bathroom group section that needed to be reconnected and re-sloped to drain correctly.

What We Installed

With the failed pipe removed, we rebuilt the line with new PVC, set to proper grade so the fixtures drain the way they are supposed to. A few details that matter on a job like this:

• New PVC pipe and fittings sized and routed for the bathroom group it serves.
• Shielded transition couplings with stainless banding at the connections, so the new pipe ties cleanly to the existing system.
• Primer and solvent cement on the PVC joints, done in the correct order, so the joints are sound.
• Slope restored along the run so the line drains by gravity instead of holding water.

Why Sewer Lines Fail Under The Colony Homes

Sewer pipe works by gravity. The line needs consistent fall so wastewater moves away from the toilet, shower, tub, and sinks. North Texas clay swells when it is wet and shrinks when it is dry, and that constant movement shifts the slab and the pipe beneath it. When the pipe moves, it can lose slope, separate at joints, crack, or start holding water. Add foundation repair to the picture, and a slab that moves can take the sewer line with it.

I have walked plenty of homes that looked perfect above ground while the camera showed a very different story underground. That is why we never approve under-slab work on a guess.

Why a Camera Inspection Comes First

The first job of a sewer camera inspection is to find out what is actually happening inside the pipe. Without the camera, everyone is guessing. With it, we can see whether the line is clear, holding water, separated, offset, blocked by roots, or losing slope. When the problem sits under the slab, that evidence decides whether the right answer is a spot repair, a partial replacement, a reroute, or a full under-slab replacement like this one. Learn more in What Can a Sewer Camera Inspection Find?

Sewer Inspection Videos: See Why Camera Evidence Matters

These sewer inspection videos show why buyers and homeowners should look underground before making a major decision. Each one shows the kind of evidence that drives a smart repair plan.

City References: The Colony, Frisco, and Plano

Under-slab sewer problems show up across North Texas, and the cause is usually the same story with a different address:

1. The Colony, TX: homes here can develop under-slab sewer issues after foundation movement or foundation repair shifts the line and changes its slope.
2. Frisco, TX: newer construction settlement and long sewer runs make slope and joint integrity worth verifying with a camera.
3. Plano, TX: older sewer systems, mature trees, and clay soil movement lead to roots, bellies, and separations under the slab.

The city changes the address. It does not change the principle: inspect the underground sewer line before buying, repairing, negotiating, or cutting concrete.

Tools and Equipment Used

A good sewer inspection and replacement depends on the right tools and the experience to read what they show:

1. RIDGID SeeSnake sewer camera and reel: used to inspect and record the inside of the sewer line in high resolution.
2. RIDGID SeekTech SR-20 locator: used to mark the approximate location of the camera head and the problem area at the surface.
3. RIDGID SeekTech ST-305 line transmitter: used to support sewer path tracing, depth estimation, and repair planning.

Helpful Internal Links

• The Ultimate Guide to Sewer Inspections Before Buying a Home
• What Can a Sewer Camera Inspection Find?
• Sewer Inspection Checklist for Home Buyers
• Real Home Buyer Success Stories
• Testimonials
• Contact Us

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