if it's anything like my 2015 37kt it's in 1 compartment, with removable drain hole. Great setup any easy to connect. I use a clear 45 degree connector to verify all the nasties are cleaned out. House Filter, shower head and water hookup are also located in the compartment, making for easy connection/disconnection. Enjoy, we love our coach, hope you do also.
Ford RV V10 5 star Tow tune
Front/Read Roadmaster 1 3/4" anti-sway bars. Roadmaster steering stabilizer
2009 Acme Tow dolly w/ 2014 Avalon Hybrid Limited