Pump, pump, old pump

We were supposed to do house cleaning today...mainly the back patio. I spray painted the gates and he is doing the pool pump. The pool pump is doing the "backflowing" business. So he is converting a new pump actually an old pump.. to a new pump to correct the trouble.
Hopefully, he is successful in correcting it.
Becuz of the back flow, erego, the green stuffs.