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**chuckster57** · 10-28-2018, 06:12 AM

Welcome to the forum

First off congrats on your new purchase. The only way to “flush” the black tank is to use the rinser, or use a wand that attaches to a hose and go through the toilet. You may have misread or been told wrong, the gray tanks don’t have anything to do with the black tank flushing except to clean the sewer hose. It’s common practice to dump the black tank first and then dump a gray tank to clean out the hose.

10-28-2018, 06:12 AM	#3
chuckster57 Site Team Join Date: Jul 2014 Location: Modesto Posts: 20,317	Welcome to the forum First off congrats on your new purchase. The only way to “flush” the black tank is to use the rinser, or use a wand that attaches to a hose and go through the toilet. You may have misread or been told wrong, the gray tanks don’t have anything to do with the black tank flushing except to clean the sewer hose. It’s common practice to dump the black tank first and then dump a gray tank to clean out the hose. __________________ 2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel. Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS. Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.