Today I upgraded the vent on the black holding tank with a Cyclone vent cover. This type of cover uses the passing breeze to create a draw out of the black tank to pull odors up and out. The original vent cover pictured below is simply a rain cover.
First remove the screws on the vent cap cover as well as the base
Once both pieces are removed, carefully remove all the old caulking without damaging the roof. In our case this is a TPO roof.
After everything is clean, drill three small holes through the base of the Cyclone cover and vent pipe to install three small screws to anchor the Cyclone to the vent pipe. This means you also have to install the Cyclone vent cap and the base at the same time so I used some masking tape to hold the base up while I put in the screws.
Then seal all the original installation holes, around the vent pipe where it comes out of the roof, and then finally seal the base cap to the roof along with the space between the Cyclone pipe and base cover.
The Cyclone fin will turn the unit with the most gentle breeze to ensure it is always providing a draw from the tank with the breeze.
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