Major Plumbing • Repiping • Slab Leaks • Los Angeles
Major Plumbing Services in Los Angeles
Repiping, slab leak repair, main line replacement, and complex plumbing projects done right the first time. Plumb Inc has been handling major residential and commercial plumbing in Los Angeles since 2015. Licensed (CA C-36 #1095692), fully insured, and available for large-scale jobs throughout the San Fernando Valley and greater LA.
Whole-Home RepipingSlab Leak Detection & RepairMain Line ReplacementCommercial Plumbing Projects
PLANNING A MAJOR JOB?
What to expect with large plumbing projects
- We provide free on-site assessments for all major plumbing projects before any work begins
- All work is permitted and inspected where required by LA County code
- We use licensed subcontractors only — no unlicensed labor on any Plumb Inc job
- Project timelines and milestones provided in writing before work starts
Free Assessment$0
Repiping (2BR)from $3,500
Slab Leak Repairfrom $1,200
Major Plumbing Services We Handle
✓ Repiping — full copper or PEX repipe for homes with galvanized, polybutylene, or failing copper pipes
✓ Slab Leak Repair — electronic detection, tunneling, or rerouting to fix leaks under the foundation
✓ Main Line Work — sewer main replacement, water main upgrades, and trenchless pipe lining
✓ Commercial Projects — multi-unit buildings, retail build-outs, and office plumbing infrastructure
Major Plumbing Pricing
Free Assessment
$0On-site evaluation for any major project
Slab Leak Detect
from $299Electronic leak location included
Slab Leak Repair
from $1,200Tunneling or reroute options available
Repipe (2BR)
from $3,500Full copper or PEX whole-home repipe
Main Line Replace
from $2,800Trenchless or open-cut options
Commercial Quote
customMulti-unit and commercial by scope
Major Plumbing Work We Perform
Whole-Home Repiping
Slab Leak Detection
Slab Leak Repair
Sewer Main Replacement
Water Main Upgrade
Trenchless Pipe Lining
Our Major Project Process
- Free On-Site Assessment — A licensed project plumber visits, reviews scope, and provides a written estimate at no charge
- Permit Pulling — We handle all required permits with LA County and City building departments
- Scheduled Work Plan — You receive a written timeline showing each phase of work before we start
- Licensed Crew Execution — All work performed by licensed plumbers under a C-36 contractor license
- Final Inspection & Walkthrough — We schedule any required city inspections and walk you through completed work
Why Los Angeles Property Owners Choose Plumb Inc for Major Work
- ✓ CA C-36 Licensed Contractor — all work performed and supervised by licensed journeymen
- ✓ Fully insured with $2M general liability coverage for all major projects
- ✓ Permitted work only — we pull all required permits and coordinate inspections
- ✓ 10+ years of major residential and commercial plumbing in Los Angeles
- ✓ Written contracts, timelines, and milestone payments — no vague "time and material" billing
Major Plumbing FAQs
How long does a whole-home repipe take?
A typical 2-3 bedroom home takes 2-3 days for a full copper or PEX repipe. We work in sections to minimize water shutoff time, usually limiting shutoffs to 4-6 hour windows per day.
Do I need a permit for a slab leak repair?
Slab leak repairs that involve rerouting pipes through walls or ceilings typically require permits in Los Angeles. We handle all permitting as part of the project — you do not need to visit the building department.
What is trenchless pipe lining?
Trenchless lining (CIPP — cured-in-place pipe) allows us to rehabilitate old or cracked sewer mains by inserting and curing a new liner inside the existing pipe — without digging up your yard or driveway.
How do you detect a slab leak?
We use electronic acoustic detection equipment and thermal imaging to pinpoint slab leaks non-invasively. Once located, we discuss repair options (tunneling, reroute, or epoxy lining) before any concrete is broken.
Can you work on multi-unit residential buildings?
Yes. Plumb Inc handles repiping, drain work, and infrastructure upgrades on apartment buildings, condos, and multi-unit residential properties throughout Los Angeles.
Start Your Major Plumbing Project
Free on-site assessment for all major plumbing work. Licensed, insured, and permitted — every job.
Call (818) 938-8660 
