Two nights ago my pump was running every 5 minutes due to heavy rainfall. Water was pouring into the pit from the normal ground water sources (not the exit pipe).
My pump and float switch are both 6 months old, I have a bleed off hole in the recommended location. There is ample clearance around my float switch, nothing can conceivably touch it, it can't get stuck on anything.
The pit typically half-fills, then the pump takes it down to a few inches, maybe 2.
I checked on the pump today, (2 days after the on and off night) and the pit is dry. Like still damp, but no standing water in the pit.
How is this possible? Has my switch already failed? It's just been 30 hours since water was pouring in, could I possibly have gotten the pump to kick on with the last ounce of entering water, then had the damp basement air dry the or completely over the past day?
The pump and switch still work, I just tested it.
What should I be concerned with?
As a test, I poured a bucket of water into the pump to add about an inch to the bottom of the sump pit (insert).
After 4 hours all the water was still there.
After 18 hours, the water is gone!
On closer inspection, there is a small hole in the bottom of my pit, just a small triangular cut (only about 0.5" wide by 2" long). So it looks like even though I have what appears to be a normal plastic sump insert, there is, in-fact, a hole in the bottom!