Waterfall sump pump

[lwparchive]

I have a waterfall that currently uses a 110V 1/2hp sump pump that feeds a 1 1/4" line, the last 15' go into a 2" line. The rise is less than 8'. I pull water from a lake that returns to the lake. I would like to increase the flow, even if I would need to increase the line to 2". The complete run is a total of 80'. What could you suggest?
The pump is suspended under my dock and operates for about 8hr/ day.

Thanks, Bob

[dlamp67]

You may try a 3/4HP sump pump. Without knowing the specs of your existing pump, it is difficult to make a suggestion.

http://www.lockewell.com/index.php?main ... cts_id=552