The Sewer Boat was shown briefly in "High Heeled Ed" as part of Ed's Swamp Ride. The boat was built for use in the sewers beneath the Cul-de-Sac. It appears that it is propelled like a Venetian gondola. Although the boat is presumably slow-moving, its size (being made out of a bathtub) suggests that it can carry up to four people at once.
- Its ostensible four-person size suggests that, like the Luxury Cruise Liner, the boat was intended to carry two passengers (and, if necessary, Plank).
- It is one of three seaworthy vessels the Eds have constructed. The others are the Luxury Cruise Liner and the S.S. Mutant Almost a Chicken Duck.
- Bathtub (Hull)
- Broom (Part of paddle)
- Hockey Stick (Part of boat handle)