Disclaimer: I don't know anything about plumbing.

Couple of my houses in NJ has sump pits and sump pumps (I don't see a pump in your pics). Water in the pit was normal, and when it exceeded a certain level the sump pump would kick on to drive the water out. After installing flooring, we had a lot of rain and the pump blew the circuit and flooded the basement and I had to replace the flooring again. Resolution:
1) Replaced original pump
2) Replaced circuit
3) Added secondary pump with battery backup
4) Eventually added house generator that kicked on automatically with loss of power

Don't fool around with water in your basement, luck!