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Your plan does NOT show the washer discharging into the tub/shower branch drain.
Your plan shows it discharging into the 3" branch 'header' which is the proper way.
If actually piped as per plan you should NOT have an issue.
"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638
Thank you for your response! The plans were made before the washer was installed on the top/2nd level. Sorry I did not disclose that as they do not appear that accurate. In reality only has a single sink, toilet, and bathtub drain, which is also used by the washer currently.
Would it actually be possible and preferrable to drain it into the only vent stack of the home instead?
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