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Trash pumps are designed to pump large amounts of water that contains hard and soft solids such as mud, leaves, twigs, sand, and sludge. Most devices are portable, heavy-duty centrifugal pumps that feature deeper impeller vanes and larger discharge openings than other pumps. Trash pumps, which are capable of processing materials with suspended particulates that would clog other centrifugal pumps, can move hundreds or even thousands of gallons per minute. Semi-trash pumps, a type of trash pump with a smaller opening, are not designed to handle large solids or high concentrations of solids. Consequently, regular trash pumps are better suited for applications that require the rigorous pumping of solid-laden water or slurries.

Trash pumps are available with a variety of features. Run dry capable pumps can operate without pumped fluid or external lubrication for an extended period of time. Self-priming pumps are designed to create and maintain a vacuum level that is sufficient to draw fluid into the inlet without external assistance. Non-clog pumps can move sticky or stringy materials.

Important specifications for trash pumps include maximum discharge flow, maximum discharge pressure, inlet size, discharge size, and horsepower.

Trash pumps are used in a variety of industrial, municipal, and specialty applications. Examples include agriculture and horticulture, construction, flood control, mining, and oil and gas production, and pulp and paper production.