I acquired a junk sump pump that had no marking, no float and seized bearings. I replaced the bearings and the motor runs well but before I put it in action draining my pool, I wanted to rig up a float shut off. The switch is internal with a pivot that pushes a rod in to turn on the motor and when the float drops, the rod pulls back to turn off the motor. When I first took it apart, they had bypassed the switch and I wondered why because it seemed to work. Now putting it together I find the switch itself is momentary but it has a housing and when the rod pushes in, it doesn't turn on until it's released. The next time it pushes in and released it turns off the motor. It makes it an on-off switch rather than a momentary switch. There is no part number on the pump or the switch that I can see. It's a unimax housing over the switch so I assume it's a unimax switch as well. But it's a different housing that I need. It's a 12 volt pump so the after market float switches I've seen wont work. I'm going to bypass the switch for now so I can test it for leaks and how many amps it will draw. The motor is rated for 32amp but I'm sure running amps will be much lower. The switch is rated for 5 amps which it drew running dry. I'm sure under load it will draw more amps than that. But the switch housing looks made for the pump. I'll post pics tomorrow if I get some interest.