Good day to you, Matt.

 MM> They finally recovered what he now calls his "$400 rat" dead in
 MM> his vent stack. 

        At least we agree on the cost ! ;-))

        Your explanation of the problem is quite valid too. I do believe
 that this is where the trouble lies. Time will tell. But I would not be
 surprised if the roots were also there. What is the building code here
 in this regards ?

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