Abstract: A multiple well pump assembly tool. The tool is designed to allow use of multiple submersible pumps in a single borehole. The tool collects the output from two or more pumps and discharges the combined output into the well discharge line. The tool may be utilized for efficiently controlling pump output to meet varying load demands, or alternatively for incrementally increasing output from a deep well. The tool may also be used to provide a primary and a standby pump in a single well bore. The rugged tool assembly is advantageous for pumping deep wells of relatively small diameter where high output is required. In one embodiment, a first header gathers output from a lower pump, and a second header combines that output with the output from a second pump and sends the total output to the well discharge pipe.