BOAF Interpretations

Interpretation #8539

Original Request

Requested By: charles futch
Requester E-Mail: CHARLES.FUTCH@CARASTRO.COM
Code Version: 2017
Code: PLUMBING
Code Description:
Chapter: Chapter 7 Sanitary Drainage
Section: 704.2 Change in Size
Topic: Reduction in size of the drainage piping
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?

Answer:

Section 704.2 prohibits any reduction in pipe size in the direction of flow, except for water closet bend fittings and water closet flanges. There is no such exception given for grease interceptor connections. Although grease interceptors are equipped with flow control devices that essentially restrict the flow entering the interceptor, this does not relieve the installer of the responsibility of complying with 704.2.

On 06/21/2021 at 6:23 PM

Commentary:

None.

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