Understand All about ''U'' Trap in Condensate Drain pipe

Hi Friends!
This video we will understand all about “U” Trap in HVAC condensate drain pipe.
What is the Purpose of U trap in HVAC condensate Drain Pipe?
Why ''U'' trap is Necessary?
How to Size the U trap and Install in Draw through unit and Blow through AHU / Fan coil Unit?

[@hg2.]

Thanks for making, but this is hard to follow.
T&N Services has a good explanation video on P-traps.

[@hg2.]

AC condensate goes into the sewer system in Singapore?
Interesting.

[@foobarmaximus3506]

Kill the music, get a real person to narrate.