I keep my hoses and all things utility in the rear most driver side compartment. That's not a pass thru and no odors seem to escape. Also, I rinse my hoses every time I dump and try to dry when I can.
I thought about the vinyl pipe approach but, instead, made these "compressors" out of some scrap wood and some 7/16" dowels. The black ends have the dowels hot glued to keep them in place.
Life is a journey, not a destination.
2005 Georgetown 359ts
Bill & Virginia, Kentucky
Nights camped in 2011...78 , 2012...73,
Nights camped in 2013...123, 2014 ...101