A thing that will help is a clear drain fitting. That way you know what's coming out of your tanks. If you have a black tank flush you know it works when clear not black is coming from the drain.
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Mike & Trish Romans 10:9
2011 Mobile Suites 36RSSB3 #5556
2017 F-350 CC 6.7 diesel dually, Banks Derringer tuner with super gauge
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