Product FAQ - Internal diameter of my sullage hose different measurements

The outer layer of your Sullage Hose is ribbed and this gives slight variance to the internal diameter. You may have noticed this when trying your fittings.

Depending on where the manufacturer cuts this product, you could get a few extra millimeters if it's on the peak of the rib vs the low point.

To fix this issue, it would be best to trim slightly to adjust the hose width and create a more snug fit.