STAMFORD, Conn. & BEAUMONT, Texas--(BUSINESS WIRE)--United Rentals, Inc. (NYSE:URI) announced today that it has entered into a definitive asset purchase agreement to acquire National Pump, the second largest specialty pump rental company in North America.* Under the terms of the agreement, United Rentals will also acquire GulfCo, a two branch general rental business also based in Texas. The combined purchase price for the assets is approximately $780 million. The Board of Directors of United Re