Originally Posted by
Jerry Peck
Michael,
I'm underlining different words which I think you may have missed.
I doubt that is "the first" "90 degree fitting" (and that, to me, is even stretching the use of the phrase '90 degree fitting) "downstream from a trap" (that exception only applies to the first fitting after the trap) "serving a lavatory or sink" (what does that serve? a lavatory or a sink?).
I think it's a lousy way to do it but I read it as permitted.
I personally would check with the AHJ if and when I encounter one. I checked the Appendix to the WI code which has diagrams but it's doesn't specifically show this type of fitting.
Is it any clearer in the international codes?