Which vent pipe is the Black Tank?
Greetings. We would like to install a Cyclone RV Holding Tank Vent on the black tank to hopefully reduce black tank odors. The problem is on our roof, the black tank and the grey tank vents are id...
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put water in toilet, flush and listen in vents for water draining into tank...or just talk into your toilet with flush valve open and you can hear which vent the sound comes out of, no I do not talk to my toilet..lol
