grease

Hello, does anyone know if a floor sink is considered the same as a mop/ service sink in code speak? The reason I ask... I believe the mop sink in a restaurant should drain into a grease trap but no where in the code do I find the mention of this. Only a floor sink. I view a floor sink as an...

https://imgur.com/a/LNTG78k I had a plumber came over and unclogged my main line with a snake, after a week it clogged again, he unclogged it again but recommended making a hole in the ground to fix the issue. He mentioned he felt the clog very close to the clean-out, but could not break it...