Marine Exhaust Hoses

Wall type and inside diameter

Wet exhaust hose is specified by inside diameter and by wall type. Shieldsflex II is the softwall hose that bends around a run. Hardwall holds its shape and resists collapse. Nautiflex silicone, straight or corrugated, is the high temperature option, and corrugated is what you use where the run needs a tight radius. Sizes run 1 inch through 12 inch ID.

Two rules keep this job out of trouble. Wet exhaust hose is not heater hose and not fuel hose, so do not substitute either way even when the ID matches. Every joint wants a T-bolt band clamp rather than a worm gear clamp, because a worm gear bites into the hose and then relaxes through heat cycles.