The Job That Helped Us Decide to Stop Doing Spot Repairs on Cast Iron (2015)
This case study examines a 2015 project that helped shape our decision to stop performing cast iron spot repairs and move to a full replacement-only philosophy. It illustrates how an earlier partial repair created no long-term value and ultimately led to duplicate cost for the homeowner.
Location
Mesquite, Texas (DFW Area)
Why This Case Matters
This job happened in 2015 — very early in our evolution as a company specializing only in cast iron sewer replacement.
At that time, the industry still treated spot repair as normal.
This project was one of the real-world examples that helped change how we operate today.
The Situation
Several years before we were called, another contractor had tunneled roughly 12 feet from outside the home to replace a short section of deteriorated cast iron branch line serving the kitchen area.
On the surface, it probably looked like a reasonable decision:
Fix the known problem
Limit excavation
Lower immediate cost
The problem was — the rest of that pipe system was the same age, same material, and in the same environment.
So the failure was never going to stop at that one repaired section.
What We Found When We Got There
When we evaluated the system years later:
- The remaining kitchen branch line was failing
- The washer branch tying into that line had issues
- Bathroom lines also showed deterioration
- The previously replaced 12 feet did not help solve the overall system problem
But here’s where this job became important.
The Better Solution That Should Have Happened Earlier (For THIS Specific House)
For this particular home layout, a better long-term solution at the time would likely have been:
👉 Reroute the kitchen line outside the slab
👉 Avoid tunneling under the house entirely for that branch
👉 Put that section of pipe somewhere serviceable long-term
Instead, tunneling was used to replace part of the original under-slab branch line — but not all of it.
That created a future problem.
Because later, when the rest of the system had to be addressed, that same tunnel path would have had to be opened again.
What Happened Next
When we designed the correct long-term solution, we rerouted.
That meant:
The previously installed replacement pipe had to be abandoned.
Not because it was installed wrong.
Not because it failed.
Because it was never part of the correct long-term system design.
So the homeowner effectively paid once for a repair —
Then paid again for the real solution.
The Hard Truth This Job Taught Us
In cast iron systems:
Spot Repair or partial replacement will cost more than full replacement over time.
Not always immediately.
But over the life of the system — very often.
And sometimes, like this case, the earlier repair money creates zero long-term value.
Why This Became a Turning Point for Us
This job was one of many early examples that pushed us toward where we are today:
Replacement only. No cast iron spot repair.
And this is important:
Financially, we would likely make MORE money long-term doing spot repairs.
Spot repairs create repeat work.
Replacement solves the problem.
From a pure business standpoint, spot repair could keep work coming for years.
But we made a decision based on what we would do for:
- Our own homes
- Our families
- Our friends
If we wouldn’t spot repair our own cast iron system, we won’t recommend it to customers.
The Reality Most People Don’t Think About
At some point, all cast iron systems in DFW will be replaced.
And when that happens, companies that only do cast iron replacement (like us) will have no work available.
If we were only thinking financially, we would spot repair forever.
We don’t.
Because we believe doing the right thing matters more than stretching work out over decades.
Important: Every Home Is Different
This example does NOT mean every situation will play out exactly like this one.
Some may be worse.
Some may be less severe.
Some layouts don’t allow rerouting.
But what is consistent is this:
Cast iron systems fail progressively.
And repairing one section rarely stops future failures.
Where We Stand Today
Today, we consider cast iron spot repair to be a waste of time and money.
Not because it never works short term.
Because it never works long term.
Our Guiding Rule
We will never recommend something to a customer that we would not do for ourselves, our family, or our friends.
Why This Case Study Matters
Because it shows how real-world experience — not theory — shaped how we operate today.
This wasn’t a marketing decision.
It was a hard lesson learned from seeing homeowners pay twice for the same problem.
If you’re dealing with a cast iron sewer system and aren’t sure what direction makes sense, we’re always happy to explain the real long-term pros and cons — even if you choose another contractor.
Related Resources
If you are evaluating full under-slab cast iron pipe replacement, you may also find these helpful:
