Call 214-341-6199 for inquiries about the Apprentice program | For dues payments, please contact the Business office at 214-341-8606

Mission & History


The mission of the UA Local 100 is to help our members build a better life for themselves and their families. For over 125 years, this has been the cornerstone of who we are.

Standards of Excellence

The UA Standard for Excellence policy not only outlines the obligations of UA members on the job; it also spells out the obligations of our signatory contractors.

Standards of Safety

We believe that every worker has the right to go home from their job in the same shape he or she arrived in. We are committed to protecting the safety of our members.


UA Local 100 was issued its charter, dated December 1, 1892, by the United Association of Journeymen and Apprentices of the Plumbing and Pipefitting Industry of the United States and Canada.

The formation of UA Local 100 was no easy task since many viewed unions as illegal and fought their formation. Even as late as the early 1900s, union members were arrested for attempting to have meetings, which were private and required a password for entry — a tradition that is still in use today.

The primary concern of the representative for UA Local 100 was to form a standard wage scale, the improvement of working conditions, and a general improvement of the workers’ standards of living. The members wanted to be able to influence the things that affected their everyday lives.

From the beginning, UA Local 100 realized that for even greater influence, it would be to their benefit to form an organization comprised of the various unions. History has shown that these goals can be accomplished when workers band together in an organized effort. This brought about the formation of our present-day AFL-CIO and Building Trades.

As we move into the future, UA Local 100 welcomes the challenges and demands that will be placed on us. We have survived many threats to our existence over the past 100 years, through wars, economic depression, and most recently, an anti-union government.