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Re: PVC to black pipe connections
"The proper way to tie into that waste line would have been by cutting in a "T". "
Most codes have, and I am surprised that the Chicago code Michael posted does not, a chart or table showing what fittings are allowed for what changes in direction, i.e., horizontal to horizontal, horizontal to vertical, vertical to horizontal. See Table P3005.1 Fittings For Change In Direction in the 2006 IRC.
Some styles of fittings are allowed in some changes in direction but not in others.
For example, a sanitary tee may be used when changing from horizontal to vertical, but may not be used when changing from horizontal to horizontal or vertical to horizontal.
A standard pressure tee fitting may not be used in a drainage system regardless of the change in direction. Which is why I stated that it was "ABSOLUTELY NOT!" allowed, only to find that Chicago, for whatever their reason, allows a standard tee, and even allows a saddle fitting to be used, which is also not allowed in the IRC.
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