C34

C34 Pipeline Contractors in California

565 CSLB C34 license records for California (Page 1 of 12)

CSLB C34 License Scope

Pipeline contractors for water, gas, and sewer lines.

565

Total Contractors

544

Active Licenses

69

Federal Records

Run CSLB License Lookup

This California C34 license lookup covers 565 pipeline contractors. 96% have active CSLB licenses. 69 (12.2%) have at least one record in federal compliance databases.

C34 Pipeline Contractor License Records

Sorted by federal records, then business name

MAGGIORA AND GHILOTTI INC

91 flags

License #226767 · SAN RAFAEL

Active

PRESTON PIPELINES INC

22 flags

License #367660 · MILPITAS

Active

PETERSON MECHANICAL INC

9 flags

License #171486 · SONOMA

Active

IRON MECHANICAL INC

8 flags

License #934181 · SACRAMENTO

Active

UNIVERSITY MECHANICAL & ENGINEERING CONTRACTORS INC

8 flags

License #460213 · EL CAJON

Active

MARELICH MECHANICAL CO INC

7 flags

License #752638 · MARTINEZ

Active

RUBEN'S PIPELINE

7 flags

License #775928 · BAKERSFIELD

Active

RUBEN'S PIPELINE INC

7 flags

License #893201 · BAKERSFIELD

Active

STONECO CONSTRUCTION INC

7 flags

License #517925 · SUSANVILLE

Active

AIRCO MECHANICAL INC

6 flags

License #311454 · SACRAMENTO

Active

KERN PACIFIC CONSTRUCTION COMPANY

6 flags

License #752556 · BAKERSFIELD

Active

ADVANCO FIRE PROTECTION INC

5 flags

License #631600 · ONTARIO

Active

BRADSHAW ENGINEERING CORPORATION

5 flags

License #383330 · SANTEE

Active

MURRIETA DEVELOPMENT COMPANY INC

5 flags

License #558592 · TEMECULA

Active

PRESTON PIPELINES INFRASTRUCTURE LLC

5 flags

License #1059395 · MILPITAS

Active

ALLIED FIRE PROTECTION

4 flags

License #251700 · OAKLAND

Active

BENICIA PLUMBING INC

4 flags

License #329632 · BENICIA

Active

GUESS PLUMBING & SUPPLY INC

4 flags

License #1050944 · SUSANVILLE

Active

ANDREINI BROTHERS INC

3 flags

License #239322 · HALF MOON BAY

Active

ARIZONA PIPELINE COMPANY

3 flags

License #423545 · HESPERIA

Active

CLEARWATER PIPELINE INC

3 flags

License #505761 · PERRIS

Active

J R PIERCE PLUMBING CO

3 flags

License #223657 · ROCKLIN

Active

LOW COST PLUMBING INC

3 flags

License #813041 · SANTA BARBARA

Active

NORTH STAR CONSTRUCTION AND ENGINEERING INC

3 flags

License #600303 · YUBA CITY

Active

SUBTERRA CONSTRUCTION INC

3 flags

License #1056913 · SAN FRANCISCO

Active

ALLEN PIPELINE INC

2 flags

License #825139 · MONROVIA

Active

BRENTON DEVELOPMENT CORPORATION

2 flags

License #1029123 · WEST COVINA

Work Comp Susp

BROADWAY MECHANICAL - CONTRACTORS INC

2 flags

License #584263 · OAKLAND

Active

DDH APPLE VALLEY CONSTRUCTION INC

2 flags

License #680052 · APPLE VALLEY

Active

FOOTHILL FIRE PROTECTION INC

2 flags

License #783132 · LOOMIS

Active

HIGH DESERT UNDERGROUND INC

2 flags

License #444032 · APPLE VALLEY

Active

KOPPL PIPELINE SERVICES LLC

2 flags

License #844802 · MONTEBELLO

Active

M C C EQUIPMENT RENTALS INC

2 flags

License #819356 · YUCAIPA

Active

STAATS CONSTRUCTION INC

2 flags

License #842398 · CASTAIC

Active

ADVANCE PLUMBING COMPANY

1 flag

License #272557 · EL CAJON

Active

ALSCO GEYER IRRIGATION

1 flag

License #350604 · ARBUCKLE

Active

AMADOR MECHANICAL INC

1 flag

License #501343 · PLYMOUTH

Active

BAESKENS CONSTRUCTION INC

1 flag

License #481844 · HESPERIA

Active

BOUDREAU PIPELINE CORPORATION

1 flag

License #791842 · CORONA

Active

CAL WEST CONCRETE INC

1 flag

License #893450 · WOODLAND

Active

CARAWAY CONSTRUCTION INC

1 flag

License #591767 · TRONA

Active

CONTINENTAL PLUMBING INC

1 flag

License #399073 · MIRA LOMA

Active

ENGEL & GRAY INC

1 flag

License #244842 · SANTA MARIA

Active

FUEL OIL SYSTEMS

1 flag

License #793536 · LATHROP

Active

GMZ ENGINEERING INC

1 flag

License #967627 · WESTLAKE VILLAGE

Active

HPS PLUMBING SERVICES

1 flag

License #793014 · BAKERSFIELD

Active

J'S PIPELINE INC

1 flag

License #727755 · CHINO

Active

JERRY THE PLUMBER INCORPORATED

1 flag

License #854067 · SANTA BARBARA

Active

JERRY'S TRENCHING SERVICE INC

1 flag

License #228083 · FRESNO

Active

KABO EQUIPMENT INC

1 flag

License #835921 · COSTA MESA

Active

C34 Pipeline Contractor License Lookup

Use this page when you need a California C34 license lookup, a list of licensed pipeline contractors, or a quick screen before assigning pipeline work to a sub. Each row links to a contractor profile with CSLB status, workers' comp, bond, federal records, and permit checks.

California has 565 CSLB C34 license records for pipeline contractors. 96% currently hold active licenses and 12.2% have at least one federal compliance record. SiteVetter checks CSLB status, SAM.gov debarment, DOL wage violations, OSHA safety citations, EPA environmental records, and building permits in seconds.

What to Check for C34 Pipeline Contractors

  • Verify the contractor license is active and in good standing
  • Request proof of insurance and bonding
  • Get at least 3 written quotes before selecting a contractor
  • Check federal databases: SAM.gov, OSHA, DOL, and EPA records
  • Confirm bond: California requires $25,000+ contractor bond (SB 607)

Why Federal Records Matter for Pipeline Work

For pipeline work, 12.2% of licensed contractors have federal records that a standard CSLB license check would not reveal. SiteVetter's 6-source lookup gives GCs a faster way to compare subs before bid award, onboarding, or renewal review.

Data sourced from California Contractors State License Board and federal databases. Updated weekly. For official verification, check directly with CSLB.

C34 Pipeline Contractors in California | CSLB License Lookup | SiteVetter