Holding tank

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A holding tank is the container that holds toilet waste on live-aboard vehicles such as recreational vehicles (RVs), trains, boats and even spacecraft.

[edit] Train

See also: Passenger train human waste disposal

[edit] Boat

See also: Head (watercraft) and London Convention

[edit] Recreational vehicle

RV holding tanks store toilet waste for later release into campground dump stations and other sani-dump dump stations. The material ends up in either a municipal sewage system or, since most campgrounds are in mor remote areas, a (hopefully) functional septic tank system.