Local commercial plumbers and steamfitters have set up small picket lines at some workplaces since the plumbers walked off the job Friday night.
12,000 workers across the province are now on strike, including 2,300 members part of UA Local 527 that stretches from Windsor to Kitchener.
These are workers in the ICI sector: Industrial, Commercial and Institutional such as offices, retirement homes, grocery stores, churches and restaurants.
Locally, the picket lines have been set up between 7am-11am at certain workplaces.