CHICAGO — Plumbing and heating contractors across the northern tier of the country had to contend with the Polar Vortex the week of January 6th as temperatures plunged well below zero at the beginning of the week, accompanied by enough snow to make driving hazardous. Malfunctioning heating equipment, frozen pipes and panicking homeowners were the most common problems. “It certainly spiked service calls,” said Mitch Zych, general manager of Air.Water.Energy. in Carol Stream, ...

Already registered? here.