Head & Holding Tank Premium Sanitation Hose, 1.50 Inch ID

For sizing, the inside diameter is 1.50 inch and the outside diameter is 2.08 inch. It’s sold as a premium hardwall sanitation hose for head and holding tank lines, so that OD is worth checking anywhere you have tight chases, bulkhead holes, or clamps that need to span the hose.

This premium sanitation hose is constructed with an extra-thick tube and cover, specially designed to resist damage from antifreeze during winterizing.

Winterizing with antifreeze is actually something this hose was built to handle. The tube and cover are specially compounded to resist that kind of exposure, so running antifreeze through it during layup shouldn't cause the degradation you'd see with a standard sanitation hose. That said, self-draining installations are still the better setup if you can manage it, since sitting fluid is harder on any hose over time regardless of the compound.