A portable spa assembly is provided comprising a pool (502) having an enclosing wall (512), where the wall further includes at least one channel formed to be in fluid communication with the interior of the pool. A pump unit, preferably formed as a self-contained modular unit, is received inside the channel in removable manner. The pump unit comprises a jet nozzle (524), which when mounted with the pump unit (504) in the channel is directed into the interior (532) of the pool. Several channels (512) can be provided in spaced apart manner along the enclosing wall (512) so as to allow the user to inject water from the pump at selected locations.
