Chicago House Wrecking Company · Chicago House Wrecking Company · leaf 88
e; provide an entrance forair in the trap and it cannotsyphon out. We accomplishthis by carrying a main soilpipe stack from the groundline to the roof of the build-ing and connecting the fix-tures directly into it. Thepurpose of the soil pipe stackis to provide air to the varioustraps so that the… … 96 Chicago House Wrecking Co., W. 35th akd Iron Sts,, Chicago The general principles explained in the fore-
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