Product Description Parts 2O FP18-15BD-P2 Sump Pump Float Switch From the Manufacturer Use this 'piggy-back' designed tethered float switch to quickly replace your failed tethered switch on your submersible sump pump. You can also replace a vertical switch if your sump diameter is at least 14 In. to provide clearance for operation. This switch is interchangeable with most brands of sump pumps. Shape of float may vary, function and rating are not affected.