Jabsco - Winterizing a Raw Water Quiet Flush or Deluxe Flush Series Toilet
Ah, regretfully 'tis the season to pack up your boat for a long winters sleep. We have a couple of marine toilets that draw water from outside the vessel to rinse the bowl. They use a separate intake pump which needs to be flushed with the pink antifreeze (propylene glycol) to prevent damage from freezing temperatures. Though system configurations widely vary, this video should give you an idea on what's involved to winterize your Quiet Flush or Deluxe Flush Jabsco Marine Head.