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What kind of drain pipe is this?


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Man, with all the solids comming through a disposal, there couldn't be a worse place for a flex drain pipe.

This cut from IRC states that drain piping shall be smooth walled interior. That makes those flex fittings non compliant in most areas.

P3002.3.1 Drainage.

Drainage fittings shall have a smooth interior waterway of the same diameter as the piping served. All fittings shall conform to the type of pipe used. Drainage fittings shall have no ledges, shoulders or reductions which can retard or obstruct drainage flow in the piping. Threaded drainage pipe fittings shall be of the recessed drainage type, black or galvanized. Drainage fittings shall be designed to maintain one-fourth unit vertical in 12 units horizontal (2-percent slope) grade.

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