Canadian Tire Centre (Ottawa Senators stadium) DOES NOT have a dedicated nursing mothers room for breastfeeding and breastpumping mothers at games and events. Moms two alternative are the following:

First Aid Station:
Located on the Main Concourse behind Section 201. City of Ottawa Paramedic Services attendants are on hand during all events at the Canadian Tire Centre. Guests requiring first-aid assistance are urged to contact any member of the Guest Services staff.

Openly nurse (The Law allows you)
Ontario law protects nursing mothers right to publicly nurse in any public or private place where they may be, without fear of harassment.

Note: This is NOT one of the official dedicated NHL nursing rooms.

Note: Report mom-shaming or harassment while nursing in public or near lactation rooms (breastfeeding rooms), at Moms Pump Here mobile site https://www.momspumphere.com