I have a sump in my basement that collects water from (I believe) outside of the house through some kind of foundation drain / weeping tile.
Lately with all of the snow melting and rain, I've noticed that the electric sump pump is not always kicking in on its own. Sometimes it does, but often I hear the backup (water-based) pump instead.
I've taken a look down the sump and it looks like the float for the switch is rising but still isn't engaging the pump. If I gently jiggle the discharge pipe, it kicks right on.
See this video, with the electric sump pump in the bottom-center of the frame (green) and the white float right above it (note the water level is already at/above the float): https://vid.me/IM6i
The float seems to rise but at some point, the water level rises over it. Could the float be waterlogged, so it does not have enough buoyancy to engage the pump? Or could it be something with the rod that connects the float to the pump? Why does it happen intermittently?
How should I go about investigating further?
Thanks for the help.