Drain Pipe Depth in Sump

I noticed the vent on your drain pipe, what's this for and is it required? I haven't had one for 10 years with no issue?.
 
I noticed the vent on your drain pipe, what's this for and is it required? I haven't had one for 10 years with no issue?.

I can't remember where out saw this but I think the idea was to minimize salt creep by catching most of the splash in the vertical "standpipes" as I'll call them. I haven't seen too much and if I put my hand over it I can feel a little bit of splatter. I was thinking about putting a 180 on them for any condensation to go back in the sump...yeah I over thought it lol.

I've found that the Tees help prevent "burping" and huge amounts of air from bubbling down into the sump. The air can escape vertically.
 
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