Nope, have nothing like that under my RV.
IMO, it appears this was an add-on after the RV was built. By whom??
You say you have a saniflush, was that added after you took delivery?
All of the protrusions (pipes, wires etc) under our RV have the expandable foam sprayed liberally in and around the hole for the device.
Suggest you buy a can from a home improvement store and make sure the pipe is sealed well.
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2018 Freedom Elite30FE
Current toad - 2019 GMC Canyon 4WD
Former toad - 2004 Jeep Liberty
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