If you don't have one get a clear 45 sewer fitting to attach to outside 3" discharge. Drain black tank, close black tank then turn on tank flush and run for 5 minutes. Open the valve, does a couple gallons of water flow visibly thru fitting? If so your flush is working.
I drain black then close valve and open flush valve and run for 10 minutes. SET A TIMER ON YOUR PNOHE!!! Now open the valve and when flow slower down close and repeat. Once that is done with tank drained close valve and let flush run for one minute then shut it off. Now your black tank is flushed and cleaned and ready for use.
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2015 RAM LongHorn Dually Air ride Aisin 4:10's
2016 MS 39TKSB3 "Highly Elited"
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