From Pathfinder Guns & Gears, which isn't enabled.

Steam Vents

HAZARD 4

Stealth +12 (trained)

Description Large pressurized pipes connected to a trip wire are rigged to release a blast of steam on trespassers.

Disable Thievery (trained) to disconnect the trip wire or a Crafting (expert) to carefully reduce the pressure and prevent the blast

AC 20; Fort +12, Ref +12

Hardness 12, HP 48 (BT 24)

Steam Blast

Trigger The trip wire is pulled or severed, typically because a creature walked through the square with the trip wire

Effect Steam erupts from the pipes, dealing 3d6 bludgeoning damage and 3d6 fire damage (DC 24 basic Reflex) to all creatures within 15 feet. Creatures that critically fail their save are knocked Prone.

Pathfinder Guns & GearsORC