I have a blockage and don't know how to clear it. From the pictures I've uploaded, I will explain what is happening. On the right side, water from the washtub builds up and is extremely slow to drain. If you put a plunger on it, it will actually back up the stack that is on the left side. The stack on the right side is coming down the kitchen sink. near the top of this stack there is an auto-vent, so air isn't getting trapped. At some point after the two pipes join and go into the floor, there is a blockage. From the looks of the PVC pipe joins, this wasn't assembled by a professional. I've tried expensive pipe chemical cleaners with no such luck. how can I clear this line? Thanks.
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