UA Local 398

Rancho cucamonga, CA

 In August of 1910 the United Association granted a charter to form a local union for work in the San Gabriel Valley of Southern California. Local 398 began dispatching from what was then the dusty farm town of Pomona (population 10,000) half a day’s journey from downtown Los Angeles on the Southern Pacific rail line. More than a century later
Local 398 is still dispatching plumbers and fitters from the Local’s offices in Rancho Cucamonga. 

The Local’s jurisdiction stretches from the peaks of the San Gabriel Mountains to the lowlands of the basin, including more than twenty major towns, among them heavily populated Corona, Rancho Cucamonga, Ontario, Pomona, and Pasadena.   

Moving into its second century of service, the goal of this Local remains the same: Help our contractors grow, train men and women for well paying honorable jobs.  

Job Specifications

Locations

Rancho cucamonga, CA

El monte , CA

Workplace

On-site

Published

2 months ago

Type

Full Time

Career Level

Entry Level

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Plumber & Pipefitter Apprenticeship Opportunities with UA 398 in the San Gabriel and Pomona Valleys

Plumbers perform work that is essential to the health and safety of our citizens. Plumbers install drinking water, waste and ventilating systems, as well as wastewater treatment systems large and small, in homes, offices, schools, hospitals and manufacturing facilities. With a growing focus on green technologies, water conservation and energy efficiency, the demand for Plumbers will increase significantly in the years ahead. Steamfitters are highly skilled workers who are responsible for every aspect of the installation and maintenance of piping systems in residential, commercial and industrial projects. They are essential to the installation and maintenance of boilers and other high-pressure equipment, especially those used in critical facilities such as hospitals. They also install and maintain heating, air conditioning and ventilation systems. Steamfitting is a specialized skill that is essential to our quality of life.


Join the UA Local 398 Apprenticeship — Build Your Future in Plumbing & Steamfitting! 

Are you ready to launch a high‑tech, rewarding career in plumbing, steamfitting, and HVAC service in Pomona, Rancho Cucamonga, and the San Gabriel Valley? Local 398’s five‑year registered apprenticeship program offers you a debt‑free, hands‑on path to success — and now’s your moment.

Why Choose Local 398?

  • Earn while you learn: Start at roughly 50–60% of journeyman wage and increase each year toward the journeyman rate, all while you’re still in school.
  • Structured training: Combine on-the-job experience working with skilled journeymen and technical classroom instruction, state- and federally registered standards.
  • Strong benefits package: Access to health and dental care, pension, paid holidays, and more once you meet eligibility.
  • Career versatility: Choose paths toward plumbing installations, steamfitting/pipefitting, or HVAC service and maintenance—trades essential to hospitals, clean energy systems, large facilities, and more.

Who We're Looking For

  • Age 18 or older
  • High school diploma or GED
  • Valid driver’s license, picture ID, Social Security card, and legal authorization to work in the U.S.
  • Good health and the ability to perform physically demanding work
  • Ability to read, write, and communicate in English
  • Reliable transportation to jobs and classes.

What to Expect

  • Five years of training: Combine paid work hours (approx. 2,000/year) with in-season classroom instruction.
  • Yearly wage progression as you master new skills
  • Probationary first year, followed by steady evaluation and advancement based on performance and attendance
  • State-certified certificate upon completion, and potentially college credit for further education.

How to Apply

  • Applications accepted Monday through Thursday, 3:00 – 4:30 p.m. (except holidays), in person only.
  • Location: 8590 Utica Ave, Suite 200, Rancho Cucamonga, CA 91730
  • Call (909) 945‑5557 to schedule your appointment
  • Bring your birth certificate, driver’s license/ID, high school transcript/GED, and Social Security card

Equal Opportunity

Local 398 does not discriminate on the basis of sex, race, color, creed, or national origin. All applications are considered fairly. 

💡 Why It’s a Great Fit for Helmets to Hardhats

If you’re transitioning from military service:

  • Tap into the UA’s Veterans In Piping (VIP) program and leverage your GI Bill benefits while training. You can gain valuable skills, earn an income, and serve your local community at the same time.
  • Be part of a proud union tradition with one of the largest local training programs in Southern California. Local 398 has been building communities since 1910, and now it’s your turn to build something great.
✅ Summary – What You Gain

Paid work: Start earning from day one, with year-over-year wage increases 

No tuition: All classroom training is covered—no debt, no financial burden.

Skill mastery: State-certified training across multiple trades.

Career benefits: Health, pension, college-credit possibilities, and union protection.

Veterans welcome GI Bill benefits and enter via VIP program tracks

📝 Ready to Apply?

  • Call (909) 945‑5557 to book your appointment
  • Head to 8590 Utica Avenue, Suite 200, Rancho Cucamonga, CA 91730 Monday through Thursday, 3:00–4:30 p.m.
  • Bring ID, education documentation, Social Security card, and birth certificate

Join U.A. Local 398’s apprenticeship program and take the first step into a career that pays, trains, and protects.

Let’s build something great together! 


Requirements

  • Birth certificate, driver’s license/ID, high school transcript/GED, Social Security card 

Additional Information

Anticipated Start Date

2025-07-25

Trade Organization

United Association - Union of Plumbers, Fitters, Welders and Service Techs