Pipe Bursting vs Pipe Relining: Cost Comparison

How Each Method Works

Pipe Bursting

Pipe bursting is a destructive replacement method. A bursting head attached to the front of new HDPE pipe is pulled through the old pipe using a hydraulic winch. The bursting head is larger than the old pipe's interior diameter, so it fractures the old pipe outward into the surrounding soil as it advances. The new HDPE pipe follows directly behind the bursting head, sliding into the space the old pipe occupied.

The process requires two access pits, one at each end of the pipe run, each typically 4 feet by 4 feet and deep enough to reach the pipe. The old pipe is completely destroyed and the fragments remain in the soil. The new pipe is a single seamless piece of HDPE with no joints.

Pipe Relining (CIPP)

CIPP relining is a rehabilitative method that preserves the old pipe. A flexible tube saturated with epoxy or polyester resin is inserted into the existing pipe, inflated to press against the pipe walls, and then cured (hardened) using UV light, hot water, or steam. The cured liner forms a smooth, jointless new pipe wall inside the old one.

The process typically requires only one access point, often an existing cleanout, though a small excavation may be needed if no cleanout exists. The old pipe remains in place and serves as the structural shell for the new liner.

Total Cost Comparison for an 80-Foot Lateral

Pipe bursting total: $5,000 to $12,000. This includes two access pit excavations ($500 to $1,500), the bursting operation with new HDPE pipe ($4,000 to $9,000), backfilling and surface restoration at pit locations ($500 to $1,000), and pre-work camera inspection and cleaning ($400 to $1,200).

CIPP relining total: $6,000 to $15,000. This includes access preparation or cleanout modification ($300 to $1,000), pipe cleaning and root removal ($400 to $1,000), liner material and insertion ($5,000 to $12,000), curing ($500 to $1,000), branch reconnections if needed ($300 to $800 each), and post-cure camera inspection ($200 to $400).

Pipe bursting is generally less expensive for a full-length replacement because the per-foot material cost of HDPE is lower than the per-foot cost of CIPP liner material. However, CIPP can be less expensive for partial repairs where only a section of the pipe needs treatment, since pipe bursting typically replaces the entire run.

When Pipe Bursting Is the Better Choice

The pipe has significant structural damage. Bursting does not rely on the old pipe for structural support. Cracked, broken, or heavily corroded pipes that cannot serve as a stable host for a CIPP liner are better candidates for bursting.

You want to increase pipe diameter. Pipe bursting can upsize the pipe, replacing a 4-inch line with a 6-inch line in a single operation. CIPP lining reduces the internal diameter slightly because the liner occupies space inside the existing pipe.

The pipe is Orangeburg. Orangeburg pipe is soft and deformed, making it a poor host for CIPP lining. Pipe bursting handles Orangeburg well because the soft material fractures easily under the bursting head.

You want the longest possible lifespan from the new pipe. HDPE pipe installed by bursting has a projected lifespan of 50 to 100 years with a proven track record in municipal and industrial applications. CIPP liners have a projected lifespan of 50 years, but the residential track record is shorter because the technology became widely available for homeowner use more recently.

When CIPP Relining Is the Better Choice

The pipe is structurally intact with joint problems. Clay pipes with separated joints, cast iron pipes with minor corrosion, or PVC pipes with root intrusion at joints are ideal CIPP candidates. The liner seals all joints and provides a smooth, root-proof interior without destroying a pipe that still has structural value.

You want to minimize excavation. CIPP can often be installed through an existing cleanout with zero excavation. Pipe bursting always requires two access pits. If avoiding any excavation is a priority, CIPP is the superior option.

The pipe has moderate bends. CIPP liners are flexible enough to navigate 22.5 and 45-degree bends during insertion. Pipe bursting struggles with bends greater than about 22 degrees because the rigid HDPE pipe and bursting head cannot make tight turns.

You only need to reline a section. CIPP can treat a specific section of pipe, such as a 20-foot stretch with joint problems, without affecting the rest of the line. Pipe bursting typically replaces the entire run from access pit to access pit.

Performance After Installation

Flow capacity. Pipe bursting maintains or increases the internal diameter (if upsized), preserving full flow capacity. CIPP lining reduces the internal diameter by the thickness of the liner (typically 4 to 9 mm on each side, reducing a 4-inch pipe to roughly 3.6 inches). However, the smooth CIPP surface has less friction than old cast iron or clay, so actual flow performance is usually equal to or better than the original pipe despite the smaller opening.

Root resistance. Both methods create root-proof installations. HDPE from pipe bursting is seamless with no joints for roots to penetrate. CIPP creates a seamless interior with no joint gaps. Both are significantly more root-resistant than traditional PVC installations with cemented joints.

Flexibility. HDPE is a flexible pipe material that accommodates minor ground movement without cracking. CIPP liner is rigid once cured, and its flexibility depends on the existing pipe surrounding it. In areas with expansive soils or seismic activity, HDPE from pipe bursting may be more resilient long-term.

Making the Decision

Start with a camera inspection to assess your pipe's condition. If the pipe is structurally sound with joint issues or minor cracks, CIPP relining is likely the more appropriate and potentially less expensive option. If the pipe has significant structural damage, is made from Orangeburg, or you want to increase the pipe size, pipe bursting is the better choice.

Get quotes for both methods from a contractor who offers both. A contractor who only offers one method has a financial incentive to recommend it regardless of your situation. A contractor experienced in both can recommend the most appropriate approach based on the camera inspection findings.