Engine 3 in Marlborough once operated a 1988 Ford C 2-Door apparatus, retrofitted with "phone booth" style jump seats, by Emergency One. It carried 750-gallons of water and was equipped with a 1250-GPM pump. The current Engine 3 is a custom built 2018 Pierce Impel with spacious jump seats. Like the predecessor it carries 750-gallons of water, but the pump is now electronic and rated to flow 1500-GPM. It hold 30-gallons of class A foam and 50-gallons of class B.