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IAPMO PS 97-2011
- Mechanical Cast Iron Closet Flanges
- standard by International Association of Plumbing and Mechanical Officials, 2011
- Publisher: IAPMO
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This Standard covers definitions, general requirements, testing requirements and marking requirements.This standard covers closet flanges which do not fall under ASTM A888 or ASTM A74 such as seen in Figure 1 which do not include typical slots for the mounting bolts.