About Us

Plumbers & Steamfitters Local 159 was chartered into the United Association on April 3rd, 1915 in Martinez, California.  Almost 100 years later, our offices are still headquartered in Martinez where we have our union hiring hall, Journeyman and Apprentice Training facility and assembly hall.  With over 500 members and over 100 union contractors, we provide skilled plumbers, steamfitters, HVAC Refrigeration technicians and service plumbers for work in Contra Costa County and beyond.  



Our workforce takes pride in partnering with our signatory contractors in providing sophisticated piping systems to the end user.  From underground installations to final connections of fixtures and equipment, a plumber is required to have all the physical and mental skills needed to get the job done right the first time.  



Our journeymen and apprentices are among the best trained in the world.  Continuing education classes are offered on a regular basis to our journeymen to keep them updated on the changes and trends in the plumbing industry.



Our members are required to graduate from the United Association (UA) certified and accredited Joint Apprenticeship Training Program which produces the best journeymen in the industry.  This 5-year apprenticeship program requires an apprentice to have over 8,000 hours of on-the-job training as well as over 1,124 hours of classroom education from certified instructors.  This means that you have the most qualified workforce at your disposal.



No matter how big or small the project, we promise a highly skilled workforce committed to ensure the customer a job that is on-time and on-budget.



Here are a few examples of our participation in developing our communities:



John Muir Hospital



Walnut Creek Water Treatment Plant



Anchor Cove Development, Richmond



Hercules Public Library



City of Concord Police Station



Cal State Pump Hose

Richmond Public Library



Kaiser Hospital, Antioch

Chevron Park, San Ramon



Contra Costa County Hospital, Martinez



Contra Costa County Department of Health Services Laboratory



Avalon Bay, Walnut Creek



Dougherty Valley Development, San Ramon







We do it right the first time!