No need to drill new holes.
Originally Posted by kcmusa
Don’t remover them, get new upgraded sensors. Follow directions, drill new holes and install.
I replaced mine with the Valterra "Horst Miracle Probes" and removing the old ones was a piece of cake.
Remove nuts that hold wire and nut that secures the "sensor" in place.
With all nut off the threaded piece just push them into the tank with a small phillips head screwdriver or ice-pick.
Cut the flange off the rubber grommet and push the remainder into the tank.
Install the new probe.
For simplicity in keeping wires straight and reconnected to the right probe/sensor just do one at a time.
As for the pieces you pushed in to the tank, the'll merely get flushed with the rest of the stuff in the tank.