Camco RhinoFLEX Gray/Black RV Water Tank Clean Out Hose, 5/8 Inch, Orange (22990)

Make sure this fits by entering your model number.
RV Water Cleaning Hose: Ideal for flushing RV black water, gray water, or tote tanks
Durable Construction: RV black water hose is made of durable PVC; bright orange color ensures that you won’t mix it up with your drinking water hoses by accident

Amazon.com Price:  $15.79 (as of 27/11/2022 09:46 PST- Details)