Tel.: 416-759-6791


Being a member of a UA Local 46 means that you have a voice.

We provide a voice for our members, working in solidarity to help them achieve job and income security, health and welfare benefits, safe working environments and pension security. We are one collective voice, ensuring you’ll be heard.

Why should I Join UA Local 46?

The decision to join UA Local 46, or any union, is an important one. Before you can make this decision, there are many questions to be answered and misconceptions cleared up. This section is designed to help you to make a well-informed decision concerning your future.

Why Consider Joining A Union?

Over the centuries mankind learned that by teaming up with others, he could tackle any task with greater success. Thus, villages and towns were formed where people could provide a safer and more stable life for themselves, their families and communities. 

Trade unionism is the same: a group of dedicated men and women striving toward the same goals provides security and dignity for all members while making important contributions to their communities.

Many voices can be louder than one voice. The United Association speaks collectively for its members, working to achieve job security, health and welfare benefits, a living wage, a safe working environment, and a comfortable pension. 

When you join a union, you are joining a democracy. Each member has the opportunity to voice his concerns and suggestions, working for a better life for all.

What Type Of Work Is Performed By United Association Members?

As a United Association member, you may be working at your job on single family residences, apartments, commercial establishments, office buildings, hospitals, airports, shipyards, fabrication shops, shopping centers, offshore oil rigs, manufacturing plants, refineries, power houses, pipelines, utility plants and systems and/or any other site where work of the United Association is being performed.

Who Hires United Association Members To Do This Work?

Our members are employed by

  • plumbing and mechanical contractors
  • fire sprinkler contractors
  • plumbing, heating, refrigeration and air conditioning service companies
  • utility contractors
  • shipbuilders (private and federal sector)
  • building and plant owners
  • utility companies
  • quality control contractors
  • control companies
  • instrumentation companies
  • air and water balance companies
  • chain stores
  • food processing companies
  • paper mills
  • power plants
  • hospitals
  • school systems
  • universities and colleges
  • federal, state and local governments
  • manufacturing companies
  • recreational centers (such as Disney World)
  • fabricating shops
  • refineries, casinos, electric power companies.

We install and service

  • fire sprinkler systems,
  • perform marine pipefitting
  • gas fitting
  • pipe fabrication and assembly,
  • lead burning, manufacturing of mechanical parts and equipment
  • air and water balance
  • pneumatic and electric control work,
  • startup of all mechanical equipment
  • quality control and non-destructive testing on all types of jobs or products
  • appliance service and repair,
  • inplant operation of mechanical systems
  • servicing utility plants and systems.

Welcome to

UA Local 46 is home to over 8,000 Unionized Plumbers, Steamfitters and Welders in the Toronto area.
Read more


Click here to login to the Member Area.

Quick Contact

United Association Local 46
936 Warden Avenue
Scarborough, Ontario
M1L 4C9

Phone: (416) 759-6791



Important Updates for ICI Sector members can be found by clicking here.


The Low Rise Collective Agreement was ratified by members attending a Special Called Meeting Wednesday May 1, 2019.


The High Rise Collective Agreement was ratified by members attending a Special Called Meeting Thursday April 18, 2019.


Click here to read the Ontario College of Trades announcement released April 15, 2019.


View the current issue of the monthly magazine online! Login to the Member Area now to check it out.


Download our New Ringtone Now!

* A download link will be sent to your email