WOW IT GREAT ,HISTORY,PLUMBING AT ITS BEST
If the house has a crawl space i cut off the plastic as high as possible.coming down vertical install cast iron and make my 90% turn with cast iron 'y' or combnation to horizonal. This really helps me soffen the noise.
I am a master plumber mechanical engineer, as well as a plumbing & mechanical inspector for a nearby municipality & have found UPC to be the most practical code for most all states I have worked in.
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