controlling sewer gas
Rodgerc1967,
We did the same thing as Texan. We added the vortex device to increase the flow of air out of the vent stack. The venturi effect created by this device from a cross wind works well. Cheap too.
And, check the seal on your adjacent fantastic vent lid. Our was not set right and created sewer gas to migrate into the RV.
Machlin
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