Sniff test doesn't work
I have a 2015 Newmar Baystar and am looking to try a new black water vent for the roof. Problem, I have two vents on the roof and only one bath so I assume one vent is for the gray water. Both are bas...
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You should be able to put something in the black tank to cause an odor that you recognize as only being from the black tank. Try Pinesol, bleach, etc. Don't wait too long or it will dissipate.
