Sprinkler Fitters Local 550

Sprinkler Fitters Local 550 is the Greater Boston union of fire sprinkler fitters, whose members design, install and service fire protection systems in commercial and residential buildings. Part of the United Association, which has represented plumbing and pipe fitting workers for more than 125 years, the local connects building owners, end users and general contractors with its contractor members and their trained journeymen. It also recruits and trains apprentices who want to enter the trade.

Members of Local 550 have been installing fire protection systems in Boston since 1916. The local puts heavy weight on training, describing the United Association’s programs as unmatched in the sprinkler fitting industry, so that contractors and end users get skilled workers on each job. Members can find forms, news and updates through a password-protected portal, and the local shares stories from fitters who describe how organizing with the union changed their lives.

What to Know

• Helmets to Hardhats connects military veterans with construction careers through the union.
• The UA Veterans In Piping program helps veterans build careers in the pipe trades.
• Contractor members offer 24-hour emergency service.