Adding a plumbing vent to old plumbing—too much work?
Ok plumber types. I understand why venting is now required, but many older systems lack individual trap vents. Moreover, older systems often have a single cast iron vent stack that is nearly impossible (impractical) to tie into on a trap by trap basis. So what is the reasonable solution when remodeling a kitchen or bathroom sink? In my situation, the previous bathroom sink had an old drum trap with no horizontal run- straight into the basement. I am happy to change to a P-trap and add the needed inches of horizontal pipe post-trap, but getting venting in that location seems…