Rust scale in the camera view
Heavy nodules reduce the pipe diameter and catch waste.
CIPP Pipe Lining
Cast Iron Pipe Lining in Knoxville, TN
Rehab for rusted, scaled and cracked cast iron drains, stacks and sewer lines without demolition.
- DiggingAccess points only
- MethodCured in place
- ResultSeamless pipe within a pipe
Cast iron served homes and buildings for generations, but it corrodes from the inside. Rust nodules build up, the flow area shrinks, and eventually seams crack and walls thin. Many older Knoxville homes and commercial buildings still have cast iron under slabs and inside walls, where digging or opening drywall is costly. Cast iron pipe lining restores the line without tearing into floors, ceilings or foundations.
We camera the pipe, descale it with mechanical tools and jetting, and install a liner that bonds to the cleaned iron. The new pipe is smooth, sealed and corrosion-proof inside, while the old iron remains as a protective outer shell. We discuss when thin or broken sections need point repair or replacement first, and we explain what we see on the video. You get a plain scope before any work starts.
When this is the right call
Slow drains in older buildings
Gradual loss of flow is the classic cast iron symptom.
Leaks at hubs and seams
Stains, odors or damp spots around joints point to failing connections.
Cast iron under the slab
Hidden pipes make trenchless lining far less disruptive than demolition.
From first call to final video
- 01
Inspect on camera
We measure remaining wall condition and flow area.
- 02
Descale
Rust and buildup are removed so the liner can bond.
- 03
Prep and fix
Weak spots are addressed before the liner is installed.
- 04
Install the liner
A resin liner is cured inside the cleaned iron.
- 05
Reconnect and test
Fixtures are reconnected and the system is verified.
Drag to compare.
Benefits that show up above ground
No wall or floor demolition
Pipes behind finished surfaces stay hidden.
New smooth interior
The liner resists rust and keeps flow steady.
Preserves strong outer shell
The iron host pipe adds support.
Less downtime
Occupied buildings stay in use during most of the work.
Cast Iron Pipe Lining: answers
Can any cast iron be lined?
Most can, provided it is structurally sound enough to host a liner. The camera shows us whether lining or replacement fits.
Will lining fix leaks at the hubs?
A continuous liner seals hub gaps. Heavily damaged hubs may need extra repair first.
Does lining work in vertical stacks?
Yes. See our drain stack lining page for details.
How long does cast iron last?
It varies by environment and use. We judge condition from video rather than age alone.
Often needed alongside this
Drain Stack LiningRebuild corroded vertical drain stacks in multi-story buildings without opening walls.Explore 
Under-Slab Pipe LiningRepair drains and sewer lines beneath a concrete slab without breaking the floor.Explore 
Pipe DescalingMechanical descaling removes rust and mineral scale from iron and steel pipes before lining.Explore 
Cast Iron Sewer ReplacementWhen cast iron is too thin or broken to line, trenchless replacement puts in modern pipe.Explore