A shower waste water pump, also known as a shower drain pump or a macerator pump, is a device that is used to pump waste water from a shower or a bathtub to a higher or distant drain or sewer line. It is typically installed in basements, below-grade bathrooms, or in situations where the plumbing does not allow for gravity drainage. The pump operates by breaking down solid waste and pumping it through small pipes, allowing for flexible and convenient waste water discharge. It is especially useful in situations where the shower or bathtub is installed below the main drain level, such as in a basement or on a lower floor of a building. The pump helps to create a more efficient and effective drainage system for the shower or bathtub.