One of the Dayton region's largest mechanical contractors just got bigger. Troy-based Wat-Kem Mechanical acquired D&L Plumbing, with offices in New Carlisle. The deal sets the stage for Wat-Kem to move into new areas including residential plumbing, said Dave Steck, president of Wat-Kem. As part of the acquisition, Dan Voight - former owner of D&L - will join Wat-Kem as its service manager. In total, six workers have now joined Wat-Kem bringing its total employment to 52. Steck - along...