I had a plumber do some rough plumbing for me awhile back, so I could install a kitchen setup in a mother/daughter configuration in our high ranch.
An engineer pointed out to me, that the plumber had failed to properly vent the sink drain line. I now need to vent the line and 'tie' it in to the house vent up in the attic. The house plumbing is ABS.
What are the 'rules' for vent pipes ?

Thanks,
Al