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Original Request
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Request ID:
8539
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Date Submitted:
June 08, 2021
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Requested By: charles futch
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Code:
Plumbing
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Edition:
2017
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Chapter:
Chapter 7 Sanitary Drainage
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Section:
704.2 Change in Size
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Topic:
Reduction in size of the drainage piping
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Question:
Is it the intent of Section 704.2 to disallow the reduction in size of the waste piping at the connections to a lint and/or grease interceptor whose connection size is smaller than the waste line size connecting to the unit?
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Comments:
Grease interceptors sizing is based on the flow rate through the unit for proper operation and not by pipe size. Often the connection sizes to these units may be smaller that the waste line connecting to the unit. Quoting 704.3, an interceptor installation was recently turned down because the connection size of the interceptor was smaller than the pipe connecting to it. Is the interceptor to be over- sized in order to have a pipe connection size the same as the pipe entering the interceptor?
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