Relining vs. Trenching: Which Sewer Repair Is Right for You?

August 20, 2022

Sewer line problems have a way of showing up at the worst possible time. One day your drains are slow, and the next you’re dealing with sewage smells in the yard or a backed-up toilet that won’t quit. If you’ve already had a camera inspection done, chances are your plumber presented you with two options: pipe relining or traditional trenching.

Both methods can fix the problem but they work very differently, and the right choice depends on your home, your budget, and what’s actually going on underground. Here in Southern Arizona, we deal with specific conditions that affect this decision from older housing stock and established trees with aggressive root systems in Tucson and Sierra Vista, to the caliche-heavy soil found throughout the region that makes digging more involved than it sounds.

At Rite Way Heating, Cooling & Plumbing, we’ve helped homeowners across Tucson, Phoenix, Sierra Vista, and the surrounding Southern Arizona communities navigate sewer repairs for years. This guide breaks down how each method works, what it costs, and how to know which one fits your situation.

Key Takeaways

Pipe relining (also called CIPP lining) repairs your existing sewer line from the inside out using a resin-coated liner with no major digging required.
Traditional trenching gives technicians full access to the pipe but comes with more disruption, longer timelines, and additional restoration costs.
Relining is typically the better fit when your pipe is structurally intact but cracked, corroded, or invaded by roots.
Trenching may be necessary when a pipe has fully collapsed or needs to be rerouted entirely.
The right method depends on your pipe’s condition, what’s above and around it, and your overall budget. A professional inspection is always the best starting point.

What Is Pipe Relining?

Pipe relining, sometimes called cured-in-place piping, or CIPP lining, is a trenchless sewer repair method. Instead of digging up and replacing the damaged pipe, a technician inserts a flexible epoxy-coated liner into the existing pipe through a small access point. Once in place, the liner is expanded to press against the pipe walls, then cured with heat, steam, or UV light until it hardens into a smooth, solid new surface within the old one.

The result is essentially a pipe within a pipe: seamless, jointless, and resistant to future corrosion and tree root intrusion. When properly installed, a relined pipe can last up to 50 years.

It’s worth noting that pipe relining is different from pipe bursting, another common trenchless option. During a pipe bursting service, a new pipe is pulled through the existing one, fracturing the old pipe outward. Both are considered trenchless sewer repairs, but they work differently and suit different situations.

Pros of Pipe Relining

Minimal disruption to your property – Only a small access point is needed, so your landscaping, driveway, and hardscaping stay intact.
Faster turnaround – Most relining jobs are completed in one to two days.
Long lifespan – A well-installed CIPP liner can last up to 50 years.
Effective for root intrusion – The seamless interior prevents tree roots from re-entering through joints or cracks.
Less restoration cost – Because you’re not digging, there’s nothing to fill back in or replant afterward.

Cons of Pipe Relining

Not an option for collapsed pipes – If the pipe has fully caved in, a liner cannot be fed through it.
Higher upfront material cost – Relining can cost more per foot than excavation in some cases, though total project costs often balance out once you factor in avoided restoration.
Requires a passable pipe – The line needs to be in decent enough condition for equipment and the liner to move through it.

What Is Traditional Trenching?

Trenching, also called open trench repair, is the more familiar approach. A crew excavates down to the sewer line, exposing it fully so technicians can repair or replace the damaged section directly. Because the pipe is completely visible, there’s no guesswork involved: what’s damaged gets fixed or replaced on the spot.

Across Southern Arizona, trenching often means working through caliche, a dense, calcium-rich layer of hardened soil that’s common throughout the Tucson basin, the Phoenix metro, and down through Sierra Vista. Caliche can significantly add to excavation time and labor costs, which is worth factoring in when comparing bids. It’s one reason many homeowners in this region find trenchless sewer repairs more practical than they initially expected.

Pros of Trenching

Full pipe access – Technicians can see and address the full extent of the damage, including any surprises.
Works on collapsed or severely damaged pipes – When a pipe is too far gone for relining, trenching is often the only viable path.
Handles more complex repairs – If the pipe needs to be rerouted, resized, or replaced with a different material, open trench work makes that possible.
Lower material costs in some cases – For short, contained repairs in accessible areas, trenching can be the more cost-effective option upfront.

Cons of Trenching

Significant property disruption – Digging leaves your yard, driveway, or landscaping torn up and in need of restoration.
Longer project timeline – Depending on the scope, trenching repairs can take several days or longer.
Added restoration expenses – Resodding, replanting, repaving, or repairing hardscape adds to the total cost and is easy to overlook when comparing initial bids.
Potential displacement – Large-scale excavation may require you to make temporary living arrangements.

Relining vs. Trenching: A Side-by-Side Look

	Pipe Relining	Trenching
Digging required	Minimal – small access point only	Extensive excavation
Property disruption	Low	High
Timeline	1-2 days typically	Several days to weeks
Works on collapsed pipes	No	Yes
Lifespan	Up to 50 years	Depends on material used
Restoration costs	Minimal	Often significant
Best for	Cracked, corroded, or root-invaded pipes	Collapsed, misaligned, or severely damaged pipes

How Southern Arizona’s Conditions Factor In

Southern Arizona’s environment creates some specific considerations when it comes to sewer line repairs. Mature trees, particularly mesquite, fig, and citrus varieties common in Tucson and Sierra Vista neighborhoods, are a frequent culprit behind cracked and root-invaded sewer lines. Pipe relining is often a strong solution here because the smooth, jointless interior of a CIPP liner gives roots no seams or gaps to re-enter.

The caliche soil layers found throughout the Tucson basin, the Phoenix metro, and Cochise County also make traditional excavation considerably more labor-intensive than in other parts of the country. That added difficulty drives trenching costs higher than many homeowners anticipate based on national pricing guides. In many cases in Southern Arizona, trenchless sewer repairs are the more cost-effective option even when upfront pricing looks similar on paper.

Southern Arizona also has a large number of homes built between the 1960s and 1980s, particularly in established Tucson neighborhoods and older parts of the Phoenix area, many of which still have original clay or cast iron sewer pipes. These older sewer lines are prime candidates for CIPP lining. They’re often structurally intact but showing significant wear, corrosion, or joint separation that relining addresses very well.

So, Which Method Is Right for You?

Here’s the straightforward answer: it depends on what’s actually happening with your pipe.

Pipe relining is likely your best option if:

Your sewer line is cracked, corroded, or experiencing root intrusion, but is still intact enough for equipment to pass through
Your pipe runs under landscaping, a driveway, or hardscape you don’t want disturbed
You want a minimally invasive solution with a long lifespan and a quick turnaround

Trenching may be the better choice if:

Your pipe has fully collapsed or is too deformed for a liner to pass through
The line needs to be rerouted or replaced with a different pipe material
The damage is isolated to a short, easily accessible section where excavation is straightforward

In some cases, the right answer is actually a combination of both. Spot excavation to address a collapsed section, followed by trenchless relining for the rest of the line. A thorough camera inspection is the only way to know for certain what you’re working with.

Ready to Schedule Your Sewer Line Repair?

Whether your home needs a minimally invasive trenchless solution or a more involved open trench repair, the team at Rite Way Heating, Cooling & Plumbing is here to help. We serve homeowners across Tucson, Phoenix, Sierra Vista, and throughout Southern Arizona with honest assessments, quality workmanship, and the experience to get the job done right the first time.

Relining vs. Trenching FAQs

What is the difference between pipe relining and pipe bursting?

Pipe relining inserts a resin liner into the existing pipe to repair it from the inside, while pipe bursting pulls a new pipe through the old one, breaking it apart in the process. Both are trenchless methods, but pipe bursting is used when the existing pipe needs full replacement rather than repair.

How long does pipe relining last?

A properly installed cured-in-place pipe (CIPP) liner can last up to 50 years, making it a long-term solution, not just a patch.

Is trenchless sewer repair more expensive than traditional trenching?

The upfront material cost for relining can be higher per foot, but when you factor in excavation, labor, and the cost of restoring your yard or driveway afterward, trenchless repairs often come out equal to or less expensive overall, especially in Southern Arizona where caliche soil makes digging more costly.

Can any sewer line be relined?

No, pipe relining requires the existing pipe to be passable. If a pipe has fully collapsed or is severely misaligned, the liner cannot be fed through it, and trenching or pipe bursting may be needed instead.

How do I know which repair my sewer line needs?

A sewer camera inspection is the best first step. It gives your plumber a clear view of the pipe’s condition, the location and extent of the damage, and which repair method is appropriate.

Does Rite Way offer trenchless sewer repairs in Tucson, Phoenix, and Sierra Vista?

Yes. Our plumbing team offers both trenchless sewer line repairs and traditional excavation services throughout Tucson, Phoenix, Sierra Vista, and the greater Southern Arizona area. We’ll assess your situation and recommend the approach that makes the most sense for your home and budget.