H2OHook Garden Hose Shower Adapter – Mr. Dirtfarmer
Amazon.com: RV Outdoor Shower Head Kit with Garden Hose Fitting and Suction Cup - RV Outside Shower - Easily Installed and Removed On Outside of Camper(RV Shower Head Kit with on/off switch,
Outdoor Shower Water Connections Explained – SunRinse Outdoor Showers