Abstract: A sump system for use in basement waterproofing systems. A sump liner may be generally rectangular in geometry, and may include two side elements with apertures to exchange groundwater while blocking debris. An adjustable inlet may be provided in another side element to fluidly connect other elements of a basement waterproofing system to the sump liner. The sump liner may further include a base configured to provide a built-in stand for a sump pump. The pump stand may contain a lip with notches to allow debris to fall and collect in a trough around a periphery of the base. The base may further provide an underside cavity for accommodating an obstruction in the floor of a sump hole. A removable lid may facilitate access to the sump liner interior, and may contain a break-away feature to accommodate discharge piping, as well as a groove to lodge a pump power cord. The sump liner may be strategically oriented within the sump hole to protect the basement foundation from erosion.