I've been considering the same thing for sometime. Except using a bilge pump. They can be had for a similar price but at twice the GPH. All you need is a small 12 volt battery or even a battery charger hooked up to it. You could do a lot of batches before the battery would need charged.
On Deck: Cream Ale and Blue Moon clone for MIL
Primary: Hopped Up Brown
Bottled: Litehaus Wheat, Orange APA, Rauchbier, Willy's Cream Stout
Kegged: Tank 7 Clone renamed "Le Ferme" (dryhopped cascade, sorachi), Caramel Amber Ale, Trout Bum APA, 3 Dogs APA
Gallons Brewed Since June: 53.5
I seriously cannot imagine a day or life without beer!