What Homeowners Need to Know:
If your home was built before the 1980s, chances are your plumbing system may
include cast iron pipes. While these pipes were once the standard, decades of wear
and tear can lead to serious plumbing issues, especially when they’re installed under
the slab foundation of your home.
Replacing cast iron under slab plumbing is not just a repair, it’s an investment in your
property’s value, safety, and long-term comfort.
Why Cast-Iron Pipes Fail Under the Slab
Cast iron was widely used because of its strength and durability, but it has a natural
lifespan of about 50 years. Over time, it begins to break down. Common problems
include:
● Corrosion and Rust – Moisture and soil exposure eat away at the metal.
● Leaks and Cracks – Leading to foundation damage or soil erosion.
● Sewage Backups – Blockages caused by scale, corrosion, or collapsed pipe
sections.
● Bad Odors & Mold Growth – From leaks that allow sewage to seep under your
foundation.
Signs You May Need Cast Iron Pipe Replacement
Watch for these red flags that often point to failing under-slab pipes:
● Frequent drain clogs or slow drains
● Sewage odors inside your home
● Water stains on flooring or walls
● Pest infestations (roaches, rodents attracted to leaks)
● Cracks in your foundation or uneven flooring
If you’re seeing these signs, it’s time to have a professional plumber inspect your
under-slab pipes with a sewer camera or run a sewer line test to confirm the issue.
The Importance of Camera Inspections & Sewer Tests
Before committing to major under-slab work, it’s critical to properly diagnose the
problem. At Aubrey Plumbing Company, we use advanced camera inspections and
sewer hydrostatic tests to verify pipe conditions:
● Sewer Camera Inspections
A waterproof camera is fed into your sewer lines to visually inspect the interior of
your pipes. This allows us to detect corrosion, cracks, blockages, and collapsed
sections without unnecessary digging.
● Sewer Line Hydrostatic Testing
We isolate and pressurize the sewer system to check for leaks. If the pressure
drops, it confirms there’s a break or leak somewhere in the line.
These tools save homeowners money by ensuring we know the exact location and
severity of the problem before recommending tunneling, re-routing, or replacement.
The Replacement Process
Once the problem is verified, there are two main solutions:
- Excavation & Replacement
Involves breaking through the slab, removing old pipes, and installing new PVC piping.
Provides a permanent, long-lasting fix. - Tunneling & Re-Routing Plumbing
● Tunneling: Soil is carefully removed from outside the foundation to access pipes
underneath without cutting through floors.
● Re-Routing: New pipes are installed in the ground outside the foundation,
bypassing the failed cast iron system.
Both methods minimize disruption inside your home and protect flooring, tile,
and finishes.
Benefits of Replacing Cast-Iron Pipes Under Slab
Protects Your Foundation – Prevents costly structural damage.
Improves Home Value – Buyers are wary of homes with old plumbing; new pipes are a
selling point.
Eliminates Sewer Odors & Health Hazards – Keeps your home safe and comfortable.
Long-Term Savings – Stop wasting money on repeated patch repairs and emergency
calls.
Trust the Experts for Cast Iron Replacement
Here at Aubrey Plumbing Company, we specialize in under slab plumbing
replacement, tunneling, and re-routing solutions. Our licensed team uses advanced
camera inspections and hydrostatic testing to properly diagnose failing cast iron
pipes before beginning replacement, ensuring your home gets the right solution the first
time.
Call Aubrey Plumbing Company today at 972-442-9523 to schedule your inspection and
learn the best options for replacing cast iron under your slab.
