u/divinebovine

My outdoor drain line is dripping and the pan below the first unit has water standing in it. The second unit pan is dry, so I believe I have a clog between the first and the second unit. Previously, I hooked up a shop vac to the drain line that's attached to my sink to clear it and poured bleach down the service point on the second unit, but it doesn't appear to have resolved my problem.

I believe the first unit probably needs a service port so I can pour bleach down that line as well. Should I cut out some of the PVC and add a tee before the p-trap so I can do that?