This standard applies to vertical diffuser, submersible motor, deep well pumps, and vertical diffuser, submersible motor, short set pumps. These are driven by vertical electric motors, or horizontal engines with right angle gears; it includes design and application Excluded from the scope of products are Vertical in-line pumps, horizontal centrifugal pumps mounted vertically such as sewage pumps, and vertical, overhung impeller, close coupled, submersible single stage submersible pumps.