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remodel and repair situations and to areas where structural design hinders the use of traditional plumbing installations, such as island sinks. The board discussed limiting the use of AAVs to low rise residential construction. At the April meeting the Plumbing Board discussed revision of the previous ruling and recommended changing the scope of the ruling to remove the limitation of three (3) AAVs per building and one (1), AAV per individual plumbing fixture. The Plumbing Board recommended instead that the scope allow each valve to function as a vent for a maximum of three(3) fixtures, and may function as a vent for up to three (3) fixtures only when those fixtures served are part of a plumbing fixture grouping such as a bathroom, kitchen or laundry area on the same floor level within the dwelling. Also, the Plumbing Board recommended that the product standards in the ruling be revised to the latest 2009 Editions. The Residential Structures Board (Residential Board) evaluated the scientific and technical facts of the proposed alternative method ruling at its Dec. 11, 2007 regular meeting. The Residential Board reviewed and approved the scientific and technical facts as they apply to AAVs used in residential structures subject to the Oregon Residential Specialty Code. Discussion: Technical discussion: Under Oregon law, when the division considers making an alternate method ruling on a method of construction, it must consider "standards and interpretations published by the body that promulgates any nationally recognized model code adopted as a specialty code of this state." ORS 455.060. The International Code Council (ICC), through its Evaluation Services and in the text of the International Plumbing code (IPC), recognizes AAVs and their product performance standards. The IPC indicates that with adequate conditions upon installation and use, AAVs are effective. In terms of authoritativeness, several promulgated ICC model codes form the basis of the state building code in Oregon. AAVs are also listed by the International Association of Plumbing and Mechanical Officials (IAPMO),which promulgates the model plumbing code adopted by Oregon. In addition to the standards published by entities that supply Oregon's model codes, several authoritative sources have published standards that recognize AAVs as a suitable construction material. One authoritative source is the American Society of Sanitary Engineers (ASSE), which published national consensus performance standards Nos. 1050-2009' and 1051-2009". ASSE standards require testing for factors such as endurance, air tightness, pressure containment, and frost closure. AAVs meet these national consensus standards for performance. Also,AAVs meet the national consensus standards for materials contained in NSF Standard 14-2009..' Other sources that provide standards for AAVs include the Canadian Standards Association(CSA) and Underwriters Laboratories (UL). These listing organizations, in addition to the National Sanitation Foundation (NSF) and ASSE standards, are used for approving other plumbing products in Oregon. Facts: As approved by the Oregon State Plumbing Board,the following scientific and technical facts apply to AAVs as an alternate method: • AAVs are venting devices designed for use with plumbing systems. AAVs are gravity- ,lJ activated devices installed close to plumbing fixtures or on stack vents. Because AAVs are Page 2 of 4