Forum Discussion

podunker's avatar
podunker
Explorer
Mar 20, 2017

Two vent pipes on 23 MBH, which one?

I just purchased one of those siphon vent covers to help remove black tank odor and noticed I have two vent stacks on my 23 MBH. Which one is the black tank vent? I assume the one closest to the bathroom, but you know what assuming can do. What is the second vent for? Appreciate the help in advance.
  • harley4275's avatar
    harley4275
    Explorer
    Mar 20, 2017
    podunker wrote:
    I just purchased one of those siphon vent covers to help remove black tank odor and noticed I have two vent stacks on my 23 MBH. Which one is the black tank vent? I assume the one closest to the bathroom, but you know what assuming can do. What is the second vent for? Appreciate the help in advance.

    get on a ladder and sniff...you will know quickly if you have used the toilet.
  • DutchmenSport's avatar
    DutchmenSport
    Explorer
    Mar 20, 2017
    One vent will be for the black tank, the other for the grey tank. The vent for the grey tank may be nearer your kitchen sink, but it's still the vent for the grey. If you have 3 tanks (1 for galley - kitchen, one for black, and one for grey, you should have 3 vents.

About Travel Trailer Group

44,026 PostsLatest Activity: Mar 03, 2025