What you all do not realize is the installer was trying to make this unit into a water source unit, that pipe in the position was only to allow the excess water to drain out when it reached that level in the unit.
Mainstream Engineering Certified.
HVAC/R PM Technician.
410A, & GREEN HVAC/R Technician.
Indoor Air Quality Master Technician.
Working not as to please men but to the Glory of Christ my KING.