Abstract: A toilet device may include a bowl portion having an interior volume and an interior surface. The device may further include a waste channel connected to the interior volume of the bowl portion through an opening in the interior surface. It may also include a rim positioned above the bowl portion and defining a lip that overhangs from the interior surface of the bowl portion. It may include a nipple molded into the bowl portion of the toilet bowl and protruding from the interior surface underneath the lip, where the nipple may include an egress channel connected to the interior volume of the bowl portion of the toilet bowl. It may further include a ventilation channel connected to the egress channel of the nipple at a first end of the ventilation channel and connected to a downstream portion of the waste channel at a second end of the ventilation channel.

Abstract: A toilet ventilation system may include a tank configured to fill with water to a threshold level. The system may also include a ventilation manifold having a manifold body, a first cavity defined in the manifold body that opens to an exterior of the manifold body through a first opening, a second cavity defined in the manifold body, where the second cavity is fluidly connected to the first cavity, where the second cavity opens to an exterior of the manifold body through a second opening, and where the second opening is blocked by the water when the tank is filled to the threshold level, and a third cavity defined in the manifold body, where the third cavity is fluidly connected to the second cavity, and where the third cavity opens to an exterior of the manifold body through a third opening.