I haven't paid attention to my 2009 Keystone Copper Canyon black tank indicators since I bought it. Empty it every time at the RV destination and it always shows full no matter how I flush it out.
But then, I've never had it back up into the bathroom neither (thank goodness!). YMMV.
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John, Noralynn and Lady Oreo (RIP Winchester)
2009 Keystone Cougar/ Copper Canyon - 1st RV "kinda bouncy:
2006 Dodge 2500 Diesel Laramie 2WD
Hoping to leave California in the next year.
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