Here's a possible option for covering a macerator hose with a sleeve, courtesy of Entegra Coach https://www.entegracoachforum.com/index.php?topic=5.0 The covering is a Protec NHS-207 abrasion resistant sleeve. The "207" corresponds to the diameter; the sleeving appears to be available from hydraulic houses like this one (no affiliation, it just turned up in my Google search) https://www.hydraulicsdirect.com/Nylon-Sleeving-hydraulic-fittings-p/ngb.htm
The stuff is pricey, at over $4 per foot, though.
Michelle
The stuff is pricey, at over $4 per foot, though.
Michelle