Large failing culverts
Big pipes with good alignment suit slip lining.
Trenchless Pipe Replacement
Slip Lining in Knoxville, TN
A smaller new pipe is slid into a larger failing pipe to renew storm lines, culverts and mains.
- DiggingSmall entry and exit pits
- MethodPull-through
- ResultAll-new pipe
Slip lining is one of the oldest trenchless methods and still a good one for the right job. A new pipe, usually HDPE or similar, with a smaller outer diameter, is pushed or pulled into the old pipe, and the gap between them is grouted. It suits large culverts, storm drains and mains where a modest reduction in diameter is acceptable and where the host pipe is straight enough to accept a new pipe.
We inspect and clean the host pipe, plan entry pits, fuse or join the new pipe sections and insert them. The annular space is then grouted to lock the new pipe in place, and connections are restored. We explain the diameter trade-off honestly and compare slip lining with CIPP and bursting for your pipe.
When this is the right call
Storm drains under roads
A new pipe can run within the old shell.
Straight runs
Fewer bends make the insertion easier.
Capacity is not critical
A small diameter reduction is acceptable.
From first call to final video
- 01
Inspect and measure
We check alignment, diameter and condition.
- 02
Prep the host
The old pipe is cleaned and obstructions are removed.
- 03
Insert the new pipe
Fused sections are pushed or pulled in.
- 04
Grout
The space between old and new is filled.
- 05
Restore connections
Inlets and laterals are reconnected.
Drag to compare.
Benefits that show up above ground
No road demolition
The host pipe stays in place.
Strong, jointless pipe
Fused HDPE has few leak points.
Good for large sizes
Works where other methods get complex.
Straightforward
A proven, familiar method.
Slip Lining: answers
Does slip lining reduce flow?
The new pipe is smaller, but its smooth wall helps. We check capacity before choosing it.
Can bends be slip lined?
Gentle bends yes, sharp bends no.
Is grouting required?
Usually, to lock and protect the new pipe.
How does it compare with CIPP?
CIPP keeps nearly full diameter and fits bends, and slip lining suits big, straight pipes.
Often needed alongside this
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