A pet fountain having a housing of snap together construction formed of a base and cover. The base includes a basin in which an integrally formed filter-holding divider is disposed that separates the basin into a return sump and pumping chamber. The cover includes a water holding bowl, an inlet and a drain overlying the return sump that encloses a pump that provides fluid to the bowl via inlet when attached to the base. The cover includes a downwardly extending tube that fluidly registers with a discharge of the pump when attached to the base. In a preferred embodiment, the cover has upper and lower bowls connected by a spillway that conveys overflow from the upper bowl to the lower bowl where it is return via drain to the return sump. The cover can be configured to mate with the housing to enclose the entire basin, pump, and filter.