If you can, replace the sanitation hose with white PVC ridgid plastic pipe. Buy the DWV type PVC which is made for sanitation. There are all kinds of long sweep 90, 45, 22.5 degree bends in addition to couplings. Hose cuffs are available for hose connections.
Any hose, will eventually permeate odor. Hoses permeate because of it's composition to make it flexible.
PVC DWV pipe will never permeate odor.
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