Tri-Cities, Washington
Sewer Line Repair & Replacement in Kennewick, Pasco & Richland
Sonlight Plumbing repairs and replaces the sewer line under the house and in the crawl space for Tri-Cities homeowners. Digging, trenching, slab work and camera inspections are not offered by Sonlight yet. If a repair needs them now, Sonlight can refer you to a trusted local company, and you work with them directly. For the work Sonlight does, you get a written price before any sewer work is approved.
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WA L&I: SONLIPL742NL · Service calls start with a $79 dispatch fee (plus tax). The dispatch fee covers travel to the service location and the plumber's arrival. Diagnostic work, repairs, labor, materials, and permits are not included in the dispatch fee and are quoted separately when needed. Any additional work requires customer approval before charges are incurred. How pricing works →
Qualifying Sonlight-supplied work includes a 1-year parts and labor warranty; terms and exclusions apply.
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When does a sewer line need repair instead of cleaning?
When the same main-line backup keeps returning after the line is cleared, the pipe itself is often the cause — roots growing through joints, a cracked or broken section, an offset joint, or a low spot that holds waste. Sonlight repairs the line under the house and in the crawl space. When the damage is underground in the yard or under a slab, that work is not offered by Sonlight yet; Sonlight can refer you to a trusted local company, and you work with them directly.
At a Glance
- Common signs
- Backups that return after cleaning, a leaking or broken line under the house, sewage odor, or a wet or sunken area over the line.
- What may be involved
- The sewer line under the house and in the crawl space, and cleanout access. Underground and under-slab sections are by referral for now.
- Good next step
- A visit to confirm where the problem is and which part of the line is involved.
- Current status
- Call or text us to check current availability.
Signs you may need this service
Main-line backups that keep coming back after cleaning
A leaking, cracked or separated drain line in the crawl space
Sewage odor outside or near a cleanout
A soggy or sunken spot in the yard over the sewer line
Slow drainage throughout the whole house
How Sonlight Plumbing can help
- Repair of the sewer line under the house and in the crawl space
- Replacement of damaged sections Sonlight can reach without digging
- A referral to a trusted local company for digging, trenching, slab work or a camera inspection, which Sonlight does not offer yet
- One written price for the work Sonlight does
The process
How a visit works
Honest, straightforward, and no pressure — here is how Sonlight approaches every job.
You tell us what's happening
Share the problem and what you're seeing — by phone, text, the request form, or Book Online.
We assess it in person
We look at the actual problem in your home — not a guess over the phone — so the plan fits what is really going on.
We explain your options
You get clear options and honest recommendations before any work begins. No pressure, no surprises.
You decide
You choose what is right for your home, and the work gets done properly.
Sewer work starts with finding where the problem actually is. If the line is backed up, it is cleared first; the written price then names the repair and the section of pipe involved. If digging or camera work is needed, you hear that up front, with a referral if you want one.
Sewer line repair follows the same written-price process in Kennewick, Pasco, Richland and across the Tri-Cities. See all service areas → Questions? Contact Sonlight Plumbing →
Where a drain problem can sit
A single slow sink and a backup that affects the whole house are usually different problems. Where the restriction sits changes what the job involves.
- At one fixtureWhen only a single sink, tub, or shower drains slowly, the restriction is often close to that fixture. Other drains in the home usually still work normally.
- In a branch line several fixtures shareWhen two or more fixtures in the same area act up together, the restriction may sit where those drains join.
- At the cleanoutAn access point that lets the main line be inspected and cleared without going through a fixture.
- In the main line leaving the houseWhen the lowest drains back up, or several fixtures are affected at once, the main line may need to be evaluated. Root intrusion, buildup, bellies, and pipe damage are possible causes.
Simplified layout shown for orientation. Actual drain routing varies by home and age of the plumbing. Where the restriction sits is confirmed on site, not from symptoms alone.
Related services
You may also need
Main Line Cleaning
Main line cleaning in the Tri-Cities for whole-home backups and sewer line clogs.
Sewer Camera Inspections
Not offered by Sonlight yet. A referral to a trusted local company is available.
Pipe Repair
Pipe repair in the Tri-Cities — copper, PEX, and galvanized pipe leaks and localized repairs.
Repair or replace?
When the problem is one section — a single break, an offset joint, or one place where roots get in — repairing that section is often the practical fix. When damage shows up along much of the line, or older pipe keeps failing in new places, replacing it is usually the better long-term choice. The written price explains which one is recommended and why.
What Sonlight does, and what is referred
Under the house. Sonlight repairs and replaces the sewer line where it runs under the house and through the crawl space.
Underground, under a slab, or needing a camera. Excavation, trenching, slab work and sewer camera inspections are not offered by Sonlight yet. If you need them now, Sonlight can refer you to a trusted local company, and you work with them directly.
Before any digging
What Happens Before Underground Sewer Work
Utility locates
Washington law (RCW 19.122) requires a call to 811 at least two business days before excavation, including boring, and utility-owned lines such as gas, power and water are marked. Privately owned lines on the property, like a line to a detached garage or sprinkler lines, are not marked by 811 and are located separately.
Permits
Sewer line repair and replacement generally require a permit and inspection from the city or county. If the repair reaches the street or right-of-way, the city requires a separate right-of-way permit. For the work Sonlight does, the requirements for your address are confirmed and included in the written price; underground and right-of-way work is handled by the company you are referred to. See Tri-Cities plumbing permits.
Which part of the line is yours
Where your responsibility ends is set by the city. Sonlight's written price covers only the part of the line Sonlight repairs.
Related guide
Go deeper: Main Sewer Line Backup Warning Signs · Main line cleaning
FAQ
Sewer Line Repair — Questions
Honest Plumbing. Clear Solutions.
Have a plumbing problem? Call, text a photo, or send Sonlight the details.
Upfront pricing: booking a visit starts with the $79 dispatch fee (plus tax). It covers travel to the service location and the plumber's arrival. Diagnostic work and repairs are separate and require customer approval before additional charges are incurred. Not ready to choose a time? Send a service request.