Replacing/ Upgrading system stack vent
Posted by Rich Dibble on September 06, 1999 at 15:38:41:
I am having trouble with the plumbing stack vent in my house. The pipes are 1-1/2" copper to the 4" septic
outlet which is cast iron. I would appreicate any advice on making the drain flow better! When the washing
machine is draining and the tiolet is flushed, it will bubble and not go down! The septic tank is empty, and
a plumber installed a surface vent under the bathroom sink, which did not help the problem.

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