I currently have a standpipe for my washer installed outside of the drywall, right behind my washer near the washer drain outlet. There is a trap installed at the bottom of the standpipe and it connects to a vented drain a few feet away. Has been working great for the past 19 years+. The issue I have is that the supplies I installed are very low. That didn't matter 19 years ago, but it seems, as I age, the floor is getting lower and further away. So, the plan is to install an outlet box to raise the shutoffs to a more humane height. Now this brings me to the question I have: these outlet boxes all have a place for the drain to be installed but that means the standpipe and trap would now be in the wall behind drywall. What are the issues with this and specifically with cleanouts. I want to make sure it's done to code (I live in Ontario, Canada by the way). My thinking is if a blockage occurred, (doing counter hex sounds and dance right now) it should be an easy matter of running a snake down the drain pipe. Or am I way off on how to deal with cleanouts for standpipes buried in walls because of laundry outlet boxes? Thanks PS: In all the videos I've viewed it seems there are more installations of these things without any cleanouts compared to those showing a cleanout.