South Warren in 48089 is where we see the most original steam. Those 1940s and 1950s homes near Chicago Road often still have one pipe systems, long steam mains and wet returns that have been rusting from the inside for decades. On a call there, we head straight for the main vents and the return, because that's where these older systems usually show their age first.
Move north into the 1960s streets along Van Dyke Avenue and around 12 and 13 Mile Road, and the picture changes. We find more split-levels, more two pipe steam, and more radiators with steam traps on the outlet. A failed-open trap there means hot returns and a bigger gas bill, so on those calls we carry a thermometer and check traps one by one.
Over in Oakland County, Royal Oak, Berkley, Birmingham, Southfield and Pontiac have homes going back to the 1920s, some of the oldest steam we work on. Those century homes tend to have bigger radiation and older near-boiler piping. When the boiler was swapped at some point, we often find the new one piped without following the manual, and that's where wet steam and surging come from.
Out in the newer parts of Macomb County, steam gets rarer, but it's still there in homes built between 1940 and 1980. Wherever the call is, the checklist doesn't change: sight glass, pressuretrol, pigtail, low water cutoff, main vents, pitch. The housing tells us where to look first. The boiler tells us the rest.