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What kind of drain pipe is this?

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No. It should be smooth-walled. I call those 'cheater' fittings. They tend to collect solids and they tend to crack on the ribs.

BTW, neither the dishwasher drain nor the NM cable to the disposal are right either.

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Nope. Those radiator hose pieces are intended as temporary repair parts only, not for permanent installation. Go to the store and pick one up, you can't find a UPC marking on them anywhere. And yes, there are other problems as Garet pointed out.

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That whole thing screams "the dude at Home Depot showed me how to install it."

Hee, hee! I actually did laugh out loud when I read that.

Take another look at your pic, there's plenty of evidence that the whole mess has been leaking for a while too.

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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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No. It should be smooth-walled. I call those 'cheater' fittings. They tend to collect solids and they tend to crack on the ribs.

BTW, neither the dishwasher drain nor the NM cable to the disposal are right either.

Thank you

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