About Mainline
South Bay's Property-Friendly Plumber™
18+ years of no-dig sewer expertise. Hundreds of trenchless replacements. Zero destroyed yards.
Meet Jesse Rendon
With 18+ years of hands-on experience in sewer line replacement and trenchless technology, Jesse Rendon has performed hundreds of no-dig sewer replacements across the South Bay of Los Angeles.
What started as Jesse's Plumbing has grown into Mainline No-Dig Trenchless Plumbing — the South Bay's go-to specialist for property-friendly pipe repair. We built our reputation on a simple promise: fix your pipes without destroying your property.
As a division of South Bay Mainline Plumbing, we bring the full weight of a comprehensive plumbing operation while maintaining the specialized focus that makes us the best at what we do.
Meet Ryan Nunez
Ryan Nunez is Mainline's co-owner and the homeowner's first point of contact. He runs scheduling, estimates, and project coordination across the South Bay — making sure every job is dispatched on time, scoped accurately, and closed out with clear communication from start to finish.
Reach Ryan directly at ryan@mainlinetrenchlessplumbing.com or call the shop at 3108087343.
“Most plumbers measure pipes. We measure weekends saved.”
Premium service. No surprise bills. No trenches. No drama.
FACTORY CERTIFIED
Level 5 Manufacturer Certifications
Not every plumber is qualified to work on high-efficiency systems. Our Level 5 certifications mean we've been trained, tested, and approved directly by the manufacturers.
Level 5 Navien Certified
Factory-certified installation, commissioning, and service for Navien condensing tankless water heaters and combi-boilers. One of the highest-rated Navien technicians in Southern California.
Level 5 Rinnai Pro Network
Level 5 certified Rinnai Pro Network member. Trained and tested on the full line of Rinnai tankless water heaters, hydronic systems, and commercial units.
Certified Raypak Installer
Certified Raypak installer for commercial and residential boilers, pool heaters, and radiant heating systems. Trusted by facilities across the South Bay.
Our Fleet & Equipment
Fully stocked trucks ready to deploy across the South Bay — 24/7.
REAL JOBS, REAL CRAFTSMANSHIP
Recent Installs Across the South Bay
Every photo on this page is from an actual Mainline job — no stock imagery, no staged shots. This is what property-friendly plumbing actually looks like.
Serving the Entire South Bay of Los Angeles
Ready to Experience the Property-Friendly Difference?
Call (310) 808-7343 or dispatch a technician online. No digging. No drama.