Plumbers & Steamfitters Local Union 342, located in Concord, California, has been a pillar of the plumbing and pipefitting industry since its establishment in 1914. This local union represents a dedicated workforce of highly skilled craftsmen and craftswomen, encompassing various trades including plumbing, steamfitting, welding, and HVAC/R service. Over the decades, Local 342 has grown through mergers, notably with Plumbers Local 444 in 1994, fostering a robust and versatile membership devoted to high standards of professionalism and safety.

The union offers a comprehensive apprenticeship program, allowing aspiring professionals to receive top-tier training while earning a competitive wage. With a mission to advocate for improved working conditions and wages, Local Union 342 is also actively engaged in political action and community events. They provide essential support services like health and welfare trust funds and a member credit union, ensuring that their workforce remains well-supported. Committed to excellence, Local 342 continues to uphold its rich legacy within the labor movement.