AC DRAINAGE PIPING REQUIREMENT

FYI and Consideration.
Although a trap is considered a good addition to prevent air from pushing out the drain and slowing or stopping the water from flowing while running. This is not shown in the diagrams and should be. I have had several air flow from the ac running an extended time and not allowing the water to drain out. If a trap is used the water forms a seal and the air will not interferer with drainage.
And yes never less than 3/4"PVC or equal, never smaller.