Add Phase 3 plumbing to the existing plumbing, being careful to only tighten the plastic union joint, and not stress the Phase 2 plumbing. Use a flexible line (ACE has these for about 5-6$, in 12-16″ lengths) 1/2″ FIP to 1/2″ FIP, connect to the strainer outlet to the pump head. The pump can be sitting on the floor, on it’s rubber feet.
https://www.amazon.com/SHURFLO-255-313-Twist-Pipe-Strainer/dp/B000V2W0GE

