The Harmony High Volume Bilge Pump moves more water with less fatigue. Shortened length makes for less fatiguing strokes while more efficient design moves lots of water. Low-profile exit port won't snag on deck rigging.
A really well designed bilge pump!
I bought this bilge pump because a friend let me use theirs and I loved it. I realized I was pumping like crazy and no fatigue and it was moving a ton of water out of the boat.