zoeller only
get the zoeller, with a mercury switch hanging separate on the side of it..
dont ever buy a sewage pump where both the switch and pump are built into only ONE WIRE to plug into the wall..
you want to get a pump with 2 wires comming off the unit. One is the switch which plugs into the wall first and the second is the motor which plugs into the back of the switch....
if the switch ever fails , you can still unplug the set up from the wall and plug the motor in directly and get by for a while....
and its much, much easier to change out just the mercury switch that is piggeybacked on the pump,
Zoeller and many other places sell cheaper pumps that literally have to be pulled out of the hole (full of sewage) when they fail, and the top seal broken down to change the
bad switch.... and you do this with everything covered in fun.
stay away from them