UPC says 908.2.4 Water Closet The water closet fixture drain or trap arm connection to the wet vent shall be downstream of fixture drain or trap arm connections to the horizontal wet vent. In a bathroom with only a WC and dry-vented lavatory, does the following violate that rule? There are two ways that 908.2.4 could be interpreted in this case: The WC fixture drain connection shall be downstream of lavatory fixture drain (in which case: fail)...
Originally asked by tom on Stack Exchange (diy) (CC BY-SA 4.0).
