Probably yes, for the vertical stacks. Cast-iron DWV from the early 1950s is 70-plus years old but holds up well structurally in vertical runs. The horizontal runs at the base of the building — where the pipe sits in wet soil conditions — are more likely to have cracked or scaled sections after 70 years. A camera inspection through the basement cleanout will show whether the horizontal runs are clear or need attention. Many Canarsie homes reach this point without a major drain failure, and targeted replacement of failed sections is often all that's needed.
A boiler from the mid-1980s is 40-plus years old and past the typical end of its lifespan. The practical signs that replacement is overdue: repair costs are increasing (multiple service calls per season), the boiler can't maintain steady operating pressure, or you see visible cracks or chronic weeping at section joints. At this age, even a boiler that's technically running should be assessed — the cost of an emergency winter failure with tenants in the building far exceeds the cost of a planned replacement on a warm-weather schedule.
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