Some of the language is unclear. My best guess is that all the elements which make up this system (including the single required pump) are mounted on a movable platform, commonly referred to as a "skid" (without wheels), which may be pushed or pulled or loaded on a truck bed with a forklift. The "additional pump" would be a separate stand-alone unit, not installed as an integeral part of the system.
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Sandy Hothe pump is an additional flushing pump .Okay, so we're talking about two flushing pumps. One is part of the basic package and one is a spare.
Sandy HoAn additional pump is not essential for the operation of the basic system.Of course I have no way of knowing what the "basic system" comprises beyond the turbine a