Reply To: P trap for dishwasher?

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#295822
breplum

The uniform plumbing code requires dishwasher drain hoses to run into a dishwasher air gap. The code is there to protect health. A DW airgap fitting provides the only positive prevention of sewage backing up into the dishwasher. P-traps do not prevent this situation.
The air gap, mounted properly and piped correctly, will provide a truly safe installation.

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