Large Pipe

 is a refined material used in crafting.

Obtaining
can be crafted using the Worktable:

Usage
is used in crafting.

Mission
Two s are required to complete one of the commissions for  The Eufaula Tunnel mission.

Commission
is occasionally requested on the Commissions Board in a Rank A commission.

Craft
is a required ingredient when crafting the following items:

Recycle
can be placed in the Recycle Machine to produce the following items:

Trivia

 * The Valve and have similar appearances, but are not the exact same item and cannot be substituted for each other.