Hello members. Recently had a new PVC stack pipe installed to upstairs bath. It runs frome 2nd floor all the way to basement then into the ground. When I flush the toilet it really "rumbles" loudly especially with paper and such making the trip. Is there any way I can get this to quiet down? I was thinking maybe some insulation. The original pipe was metal and very quiet. Thanks for all the help! Gmoore.
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Cast iron is definately very quiet. Putting some insulation around the pipe would make it quieter. 
