Is replacing a cast iron drain stack worth it after an inspection?
Verdict: DEPENDS — Depends. If the scope shows channeling or scale, replace before remodeling. A working 80-year-old stack with clean flow can stay — disclose and move on.
Cost & payback at a glance
| Typical cost range | $2,500–$9,000 |
|---|---|
| Estimated annual benefit | Non-financial (comfort / safety / resale) |
| System | plumbing |
| Scenario | inspection |
How HomeScore decides
HomeScore evaluates "is it worth it?" decisions across 40+ home systems using 2026 cost data, regional installer rates, lifespan modeling, and resale ROI. Every verdict on this page is anchored to the underlying replacement cost, annual operating savings, and the scenario you're in: general homeowner, in-2026 pricing, resale-driven, forever-home, or pre-1980 retrofit.