A retailer gives a useful side-by-side specifications for 7 manual, 6 portable, and 18 electric heads.
[West Marine, USA]
Some of these toilets built in the 1920′s are said to be still working. One of the most reliable heads available. Pump can be mounted on either side of bowl. Castings are bronze, bowl is porcelain
[Blakes Lavac Taylors, Warsash, the UK]
Biodegradable non-toxic head bowl and seal cleaner.
[Seacoast Services, Inc., USA]
Porcelain electric heads for a variety of DC and AC current, using fresh or salt water. Multiple colors.
[Galley Maid Marine, West Palm Beach, FL, USA]
Manual and electric heads. Options include pressure water, integral holding tank, choice of voltage, macerator, seawater or freshwater, 1 or 3-quart flush. Owners′ manuals and parts information included on line.
[Raritan EngineeringCompany, Inc., Millville, NJ, USA]
Attacks lime, rust and other hard water deposits on toilet plumbing fixtures.
[Rust ! Solver, Fort Wayne, IN, USA]
Several models of composting toilet designed for cruising boats. Reduce bulk and odors of solids. Pump out less often.
[Sun-Mar Corp., Burlington, ON, Canada]
Simple toilet mechanism uses a remote diaphragm pump as its only moving part. As waste is pumped out, the vacuum formed by the head lid draws in replacement flushing water.
[Blakes Lavac Taylors, Warsash, the UK]
Biodegradable tissue designed for low-water-use heads. Breaks up easily for passage through small diameter hoses.
[Seacoast Services, Inc., USA]
Marine composting toilet reduces volume of solid waste, reducing frequency of pumpouts, and eliminating or supplementing holding tank, Simple operation, reduced smell, and low maintenance are claimed.
[EOS Design, LLC, Mount Vernon, OH, USA]