This is the hose that connects the fresh water fill hatch to the water tank.

Your original hose may have a corrugated section then a smooth section. This was repeated for the length of the hose. It could also have had blue or green rings on it. This hose directly replaces that old style.

Here is an example of an old style fill hose that is ready for replacement.

1-3/8 inch inside diameter. Sold in a 5 foot and 10 foot sections. 5 Foot is the most common length.

Clamps are available.

Part number 4731G1081