N.R.G.
Well-Known Member
I battled uniseals for years and once you get them working if you don't move anything you can be fine but we have had some battles let me tell you. We switched to 3" bulkheads a few years back and it's been NICE. More up front cost but worth it IMHO.Very hot topic here. Uniseals work well. Bulkheads are costly. Shout-out to @fragileassassin for the idea to use Adapters with some modification by cutting the threads shorter so the nut can seat down. Adding gaskets would help immensely.
https://www.homedepot.com/p/1-1-2-in-ABS-DWV-SPG-x-SJ-Trap-Adapter-C580127HD112/100344703