Plumbing
Pipe Small Wall Broke Blue
While not as sturdy as solid concrete, iron constructions have high structural integrity, requiring fewer support pillars.
Drops when destroyed
Iron× 1-2
Short Iron Pipe× 1
Where to find (4 POIs)
Area 7 (tier 5), Shotgun Messiah Factory (tier 5), The Last Sunset Nursing Home (tier 5), WW Pumping Station.
Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.