Hey Matthew,

this looks like a great attempt at maintaining head pressure across the pump, or maybe the screeching noise it makes is the telltale it works, Barely!

I haven't seen anything for sumps for that purpose. My concern(s) would be the discharge termination, so it does not erode any ground around the end of line.
The discharge port if the pump looks to be 1-1/4", it should run undiminished in size to it's termination.

Hope this helps,

Pat