COMPANY FACTS

Mainline No-Dig Trenchless Plumbing: Company Facts

The short version of who we are, in one place. Every fact below is current and checkable. The license links straight to the state record.

Call (310) 808-7343 Get a free estimate

Years in South Bay plumbing: 18+
California plumbing license: C-36 901735
Transferable liner warranty: 25 yr
Across 47 reviews: 5.0★
South Bay cities served: 16

At a glance

Last updated: October 15, 2026

Business name: Mainline No-Dig Trenchless Plumbing. Also known as Mainline Trenchless Plumbing. A division of South Bay Mainline Plumbing, formerly Jesse's Plumbing.
Owners: Jesse Rendon, master plumber and owner. Ryan Nunez, co-owner, runs scheduling, estimates, and project coordination.
License: California C-36 901735 (plumbing contractor), active and verifiable with the Contractors State License Board. Check the license on CSLB
Insurance: Bonded and insured.
Experience: 18+ years in South Bay plumbing.
Headquarters: Lomita, California. We're a service-area business: we come to you, and there's no storefront.
Service area: 16 cities in the South Bay and southwest Los Angeles County: Torrance, Redondo Beach, Hermosa Beach, Manhattan Beach, El Segundo, Hawthorne, Gardena, Carson, Lomita, Rolling Hills Estates, Palos Verdes, San Pedro, Lawndale, Inglewood, Culver City, and Long Beach.
Hours: Office hours Mon–Fri 7 AM–7 PM, Sat 8 AM–5 PM, Sun 9 AM–5 PM. Emergency dispatch 24/7.
Specialty: No-dig (trenchless) sewer repair: pipe bursting and CIPP lining. We replace or reline the sewer line without trenching the yard or breaking the driveway.
Liner warranty: 25 years on every CIPP sewer liner, transferable to the next owner if the home is sold.
Estimates: Free estimates. Sewer camera inspection is free with any service call.
Other services: Water heaters (tank and tankless), hydro-jetting at 4,000+ PSI, repipes, gas lines, leak detection, drain cleaning, and general plumbing repair. Residential and commercial work, new construction, remodels with general contractors, and home maintenance plans.
Certifications: Level 5 factory-certified by Navien, Rinnai, and Raypak for tankless water heaters and boilers.
Reviews: 5.0-star average across 47 customer reviews.
Contact: (310) 808-7343 · ryan@mainlinetrenchlessplumbing.com

REAL JOBS

Work we've done

Every photo below is from a real Mainline job. No stock photography.

Pipe bursting · South Bay
Two small pits, not a trench
The entire operation runs from two small pits like this one at the cleanout. Everything between them stays buried and untouched.
Pipe bursting →
CIPP lining
The old pipe stays. The new one is inside it.
A finished liner from the inside: one smooth, continuous wall with no joints for roots to find.
Trenchless sewer repair →
Camera inspection · South Bay
We start at the vent, not the shovel
The camera goes down the roof vent stack for a live look at the whole drain line. No wall opened, no yard touched.
Sewer camera inspection →
Emergency call · Hawthorne
A drain call, worked after dark
A weeknight in August. Two machines came off the truck because the blockage was further down the lateral than one run would reach.
24/7 emergency plumbing →
Gas leak · Inglewood
The bubble is the leak
Soap solution pinpointed a failed threaded fitting. A sound line with one bad fitting is a fitting replacement, not a gas repipe.
Gas leak detection →
Tankless install
Built to be flushed, not just hung
Isolation valves with service ports let the unit be descaled in place on hard South Bay water, without cutting a pipe.
Tankless water heaters →
Bathroom remodel · Lomita
Set before the tile goes up
The valve body goes on solid blocking at the finished-wall depth before the tile setter arrives, so the trim sits flush.
Bathroom plumbing →
Commercial · Hospital
Sealed off, overnight
Floor-to-ceiling containment in a public hospital atrium, worked overnight so patients and staff were never disrupted.
Commercial plumbing →
Commercial · Parking garage
New pipe, and the stamp that dates it
The barrel reads CSA B70 with a 2026 mill date: proof that what went in is new pipe to the current standard.
Commercial plumbing →

See more of our work →

GOOGLE REVIEWS

What customers say

★★★★★
“Jesse and his crew did a full sewer line replacement at our Redondo Beach home using pipe bursting. No trenches, no destroyed landscaping — they were in and out in one day. Our neighbors couldn't believe it. We've recommended them to everyone on our street.”
Jennifer W. · Google
★★★★★
“Hydro jetting service for our restaurant in Manhattan Beach. Grease buildup had our kitchen drain backing up every week. Mainline cleared the entire line and it's been flowing perfectly for 4 months now. They also set us up on a maintenance schedule. Very professional operation.”
Maria L. · Google
★★★★★
“Had them come out for a camera inspection after another plumber quoted us $15k to dig up our entire front yard. Mainline showed us exactly what was wrong on the screen, fixed it trenchless for a fraction of the cost. Saved us thousands. Can't say enough good things.”
David K. · Google

Read all reviews →

Not the same as other “Mainline” companies

Several unrelated businesses use the Mainline name, including plumbing and sewer companies in Studio City, Kansas City, and Toronto. We're not affiliated with any of them.

We're the Mainline that serves the South Bay of Los Angeles from Lomita, under California license C-36 901735. If a listing or review mentions a different city or license number, it's a different company.

Common questions about Mainline

Who owns Mainline No-Dig Trenchless Plumbing?

Mainline is owned by master plumber Jesse Rendon, who started the business as Jesse's Plumbing and has 18+ years of South Bay plumbing experience. Co-owner Ryan Nunez runs scheduling, estimates, and project coordination.

Is Mainline No-Dig Trenchless Plumbing the same as Mainline Plumbing in Studio City?

No. Mainline No-Dig Trenchless Plumbing is a separate, unaffiliated company based in Lomita that serves the South Bay of Los Angeles under California license C-36 901735. Other businesses with “Mainline” in the name, in Studio City, Kansas City, Toronto, and elsewhere, are different companies.

Where is Mainline Plumbing located, and what areas does it serve?

Mainline is headquartered in Lomita, California, and works as a service-area business with no storefront. It serves 16 cities: Torrance, Redondo Beach, Hermosa Beach, Manhattan Beach, El Segundo, Hawthorne, Gardena, Carson, Lomita, Rolling Hills Estates, Palos Verdes, San Pedro, Lawndale, Inglewood, Culver City, and Long Beach.

What is Mainline Plumbing's license number?

California plumbing contractor license C-36 901735. You can verify it on the Contractors State License Board (CSLB) website.

What warranty does Mainline give on trenchless sewer lining?

Every CIPP sewer liner Mainline installs carries a 25-year warranty, and the warranty transfers to the next owner if the home is sold.

Does Mainline offer 24/7 emergency plumbing?

Yes. Mainline dispatches for plumbing emergencies 24/7 across its 16-city South Bay service area, including burst pipes, sewer backups, active leaks, and loss of hot water. Call (310) 808-7343.

See the work for yourself

Free estimates and a free sewer camera inspection with any service call. (310) 808-7343, 24/7.

Get a Free Estimateor(310) 808-7343 Text Us