Garbage disposal

[Deathray]

There is like a spigot from the drain pipe for the garbage disposal. Our dishwasher drain line ia hooked into our garbage disposal. When I turn the disposal on, stuff comes out of the spigot. Never seen this before. What is the hole in the drain pipe for?

 

[ExtraMilePlumbing]

That was a drain hole for a reverse osmosis filter.

 

[frodo]

That was a drain hole for a reverse osmosis filter.

That was an illegal drain hole for a reverse osmosis filter

remove that tee and replace it