Three races for townwide seats will be on tap when voters go to the polls for the annual town election on Saturday. Polling hours are 8 a.m. to 8 p.m. Three candidates are competing for two seats on the Board of Selectmen. Incumbent Robert C. Hogan is vying with Christopher E. Hartling and Virginia E. Mooney. Hogan is the town’s director of veterans services. Hartling is a Town Meeting member who also sits on the Council on Aging. Mooney is a longtime Town Meeting member and former selectwoman. Two candidates are running for a seat on the Recreation Commission: incumbent Kristine E. Brown and James Mennitto. And First Constable William F. Pepicelli is being challenged by Dennis C. Otis. Twelve other candidates are running unopposed. Voters will also elect Town Meeting members. There are 48 seats to be filled, eight of which do not have any candidates on the ballot.