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Question: 08-06 Code Section: 7 Date: 8 February 2008

OBC 2006 Reference: 1.4.1.2.(1), 7.5.2.1.(1)(g)

Question: The attached illustration... (is)...in regards to the venting of a water closet and bath tub installation. Our inspectors are seeing this in housing and to me it does not look right but I am wondering if it meets the wet venting requirements as written in the code. I have read over 7.5.2.1. and cannot seem to find any wording that can restrict this type of installation.

 

Interpretation: Section 7.5.2.1.(1)(g) refers to the "continuous vent" serving a wet vent. The diagram shows a "back vent". The definition in section 1.4.1.2.(1) defines it as an extension of a VERTICAL section of a branch or fixture drain. Note all the explanatory drawings in the appendix all show the wet vent terminating in a continuous vent that we used to call a continuous waste and vent.

Approved at AMES 2008

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