Inspecting my Heartland Fuel Fifth Wheel Rv for the black and grey tank vent. I found this RV to have a bit of a tank odor when either the black or grey tank was full or close to full. Suspecting an issue with the anti syphon valve on either of the tanks I opened the wall to see if I could track down the issue. Turned out both tanks are vented into one pipe that does not have an anti syphon value and it does not vent outside to the roof. I feel this is an incorrect install on Heartland's part and I am working to correct the issue myself.

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