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Old 06-23-2018, 07:04 PM   #21
Rivet Master
2018 28' International
Fayetteville , Georgia
Join Date: Jan 2018
Posts: 699
If your gray tank is full, it will back up through the shower drain, as that is the low spot. To me it sounds more like a vent issue.
2018 International Serenity
Cute wife...
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