Plumbing
Pipe Small Wall Cap Red
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 (2 POIs)
Carl's Cars (tier 3), Pass-N-Gas Plaza (tier 3).
Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.