A couple of things to consider for a brew pump.
Are you going to use it after the brew kettle to pump though a counter flow or plate chiller? If so, you need something that can take the 200 degree heat. If you are chilling in the kettle, and just need to pump the beer to the fermenter, you need to consider the distance of the hose and the difference in elevation; both of these play a part in the head pressure of a pump. You also want a pump with has food grade materials that will come in contact with your wort.
In short, you probably want the features of the 'beer' pumps out there. Do some research, there are other pumps, like the Little Giant brand that are marketed as spa or pond pumps, but meet all the requirements and might be lower cost.