Thousands of people are expected at an anti-water charge rally on Saturday.
This is the fifth demonstration the Right2Water campaign has organised, and they say approximately 500,000 people have attended their protests to date.
Unions linked to Right2Water say they are using the movement's platform to campaign change in areas like homelessness and health care - with water charges just "the tip of the austerity iceberg".
The unions - which include Unite, Mandate and the TEEU - say they will be holding 'town hall meetings' across Ireland in the coming months, after Saturday's protest.
The march will take place on O'Connell Street in Dublin at 2.00pm - with assembly points at Heuston Station and Connolly Station.
Des Fagan, Right2Water coordinator, told Newstalk Breakfast privatisation is a real fear for them.
