Drill down through cabinet, run new drain with AAV down through base of cabinet, tie in to existing 3” pvc. Replace additional 10’ section of cracked 3” cast iron in crawlspace Ended up having to replace all of the off section in the crawlspace as well. Once I removed the cast iron I found the occ section was back pitched and completely packed full of grease. Tested new install to ensure a leak free installation. Water pressure in the house is high. Notified homeowner and left a quote for it.
