Sewer Sweep

Sewer Sweep

R.U.R. by Karel CapekA metallic, barrel-shaped, quadrupedal contraption systematically makes it way along the underground passageway. It pauses suddenly as the mechanical “head” on top spins around, pointing a glowing red gemstone and an odd-looking nozzle in your direction.

Sewer sweeps were created ages ago to keep sewers and underground chambers clean of vermin, slime, mold, fungi, and flammable garbage. Whether they were created by some ancient civilization or by a long-lost clan of gnome tinkerers is unknown. A sewer sweep faithfully follows the last orders it was given—usually to patrol a certain area from end to end, cleaning up as it goes.

Sewer Sweep (CR 4)

XP 1,200
N Medium construct
Init +2; Senses darkvision 60 ft., low-light vision; Perception +0 …

AC 16, touch 12, flat-footed 14 (+2 Dex, +4 natural)
hp 40 (4d10+20)
Fort + 1, Ref + 3, Will + 1
Defensive Abilities construct traits; DR 10/–

Speed 30 ft.
Melee slam +5 (1d8+1)
Special Attacks flamethrower

Str 12, Dex 15, Con –, Int –, Wis 11, Cha 1
Base Atk + 4; CMB + 5; CMD 17

Environment sewers
Organization solitary
Treasure none

Flamethrower (Su) The sweep’s nozzle can swivel 360 degrees and shoot a 15-ft.-cone of flame every other round. The flames cause 5d4 fire damage (Reflex DC 13 for half).


Assembling the metal body of a sewer sweep requires the Craft Construct feat and an outlay of 12,000 gp for materials.

Requirements animate objects (or limited wish), burning hands, creator must be CL 12th.


Sewer sweeps were made to clean, but they are completely indiscriminate about what constitutes “underground vermin” and “garbage.” Dungeon delvers meeting one are advised to proceed with caution—it may lead with its flamethrower. For close combat, a sewer sweep punches with one leg while standing on the other three.

(This post is Product Identity.)

5 thoughts on “Sewer Sweep”

  1. This sounds exactly like what some Mage with too much time on his hands would think up… but only after his wife had nagged at him about doing something about ‘those rats’ in the the dungeon of the tower. An elegant solution all around. Excellent creation.

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