Sudden stink!
We came back from a couple weeks in NV and NM, parked the rig in the back yard and all was good! A few days later I notice an odor in the trailer - it took two days to narrow it down to the bathroo...
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I would put some water in the toilet first to see if it drains down. If it holds water it's ok. Next check air admittance valves but if it stinks in the basement it may be that a vent has some loose.
