Sewer & Drain · Nashville, TN
Cast Iron Pipe Replacement in Nashville
Scaled, cracked and channel-rotted cast iron under the slab or in the crawl space replaced with PVC before it lets go.
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Cast Iron Pipe Replacement in Nashville, Tennessee
Scaled, cracked and channel-rotted cast iron under the slab or in the crawl space replaced with PVC before it lets go.
For cast iron pipe replacement, Nashville's Sewer and Drain works across Middle Tennessee — licensed, insured, with the price in writing before the work starts. Drain and sewer crews who clear the stoppage first, then put a camera down the line and show you what caused it.
Why homeowners call
Signs that bring people to us for this
- Sewage coming up a floor drain
- Every drain in the house slow at once
- Gurgling toilet when the washer drains
- Sewer smell in the yard or basement
- A soggy, sunken strip over the sewer line
- Roots back in the line every year
- Sump pump running and running
What is included
What our cast iron pipe replacement work includes
- Camera run through the house drain and under the slab
- Channel rot, scale and cracked hubs logged by location
- Descaling and lining priced where the pipe can be saved
- Crawl space runs cut out and replaced in PVC
- Shielded no-hub couplings at each cast iron transition
- New pipe hung and supported at proper spacing
- Slab trenched, or tunneled under, where lines run beneath it
- Drains tested with water before the floor is closed
How Cast Iron Pipe Replacement goes, from cleanout to final pass
Cast iron drains in older houses tend to fail along the bottom of the horizontal runs, where water flows and solids drag and corrosion works from the inside. The result is called channel rot, a groove that thins until the pipe cracks lengthwise and leaks into the crawl space or the soil under a slab, often while the top of the pipe still looks fine.
Scale is the other cast iron problem. Rust builds into lumps inside the bore that catch paper and grease, until a 4-inch line drains like a much smaller one. Descaling with a chain knocker or a cutter can open it back up, and if the wall underneath is still thick enough, the cleaned pipe can be lined instead of torn out.
Where it runs decides the work. In a crawl space house, which describes a great deal of the older housing around Middle Tennessee, cast iron hangs in the open and can be replaced in PVC one section at a time. Under a slab, the choices are a trench through the floor, a tunnel from outside or a liner from a cleanout, and we compare them before anyone saws concrete.
Partial replacement is common and sound when the joints are done right. Where new PVC meets old cast iron we use shielded no-hub couplings, a rubber sleeve inside a stainless steel band sized to both pipes, so the joint stays straight and sealed. A bare rubber coupling without the shield can sag under the weight of the pipe and start to leak.
Also available
Other sewer, drain and septic work
Sewer Line Repair
Bellies, offset joints, root intrusion and collapsed sections repaired after the camera has shown where and how deep they are.
Learn moreSewer Line Replacement
A new lateral from the foundation to the city connection, dug or trenchless, permitted and inspected before it is covered.
Learn moreOrangeburg Pipe Replacement
Tar-paper sewer pipe laid from the late 1940s into the early 1970s that has flattened into an oval, replaced with a line that keeps its shape.
Learn moreSewer Excavation
Open-trench repair where trenchless will not work, with Tennessee 811 locates first and the yard put back after.
Learn moreService area
Sewer and drain calls we take across Middle Tennessee
Our trucks reach Nashville and 100 more towns in 12 counties, and we take sewer and septic calls anywhere within about an hour of the city.
FAQ
Cast Iron Pipe Replacement: what people ask first
How do I know if my cast iron drain pipes are failing?
Look for rust weeping or orange streaks on pipes in the crawl space or basement, cracks running along the length of a pipe, damp soil or a sewer smell under the house, and drains that clog again and again in a house built before the 1970s. A camera run shows channel rot and scale from inside, and the inside is often worse than the outside suggests.
Can cast iron sewer pipe be lined instead of replaced?
Often, if the pipe still has enough wall left once it is cleaned. The line is descaled down to bare metal, filmed to check for holes or missing bottom, and then lined with a resin liner that becomes the new inside surface. Where channel rot has eaten away the bottom over a long stretch, that section is cut out and replaced instead.
Do I have to break up my floor to replace cast iron under a slab?
Not always. A trench cut through the slab is the most direct route, but tunneling under the foundation from outside spares the floors, and lining the old pipe from a cleanout avoids digging altogether if the pipe qualifies. Which one fits depends on the length of the run, how many fixtures tie in along it, and what the camera shows.
Should I replace all my cast iron pipes at once?
Not necessarily. Cast iron fails unevenly, and a house can have one rotted horizontal run in the crawl space with years left in the vertical stacks. The camera and a look at each section decide it. Replacing everything at once makes sense when failures are spread through the house, or when walls and floors are already open for a remodel.
Free estimate
Book cast iron pipe replacement with our crew
Call or write to Nashville's Sewer and Drain with what the drains are doing; we clear the line first and price any repair from the camera footage.