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IAPMO IGC 117-97 (R2013)
- Interim Guide Criteria for Water Closet Riser Assemblies
The purpose of this IGC is to establish a generally acceptable standard for water closet riser assemblies. This IGC is not intended to be a specification guide nor is it intended to restrict design. Its purpose is to serve as a guide for producers, distributors, archietects, engineers, contractors, installers, inspectors and users; to promote understanding regarding materials, manufacture and installation; and to provide for identification of fittings complying with this IGC.