A couple who have completed at 10,000-mile tour of the Pacific on a 31-foot cutter talk about what equipment they chose and how it worked, including their toilet and hoses..
Water jet macerator heads with waterproof switches and shared or dedicated pressure pumps.
A long-time cruiser on a 31-foot boat is talks about the advantages and quirks of their Air Head toilet, including space and time considerations, with use and installation tips.
An extensive site devoted to maintaining and troubleshooting the head. Land-based toilets are the primary subject, but some information is useful for marine toilets as well.
How to replace your head with an upgraded model, plus install a Lectra San sanitation device "with very little trouble."