GROCO K Series Hand Operated Marine Toilet

The GROCO K Series Hand Operated Marine Toilet is the industry standard for cruising sailors and liveaboards who demand reliability where shore-side plumbing isn't an option. After decades on the water, you learn that head systems define comfort during extended passages—and the K Series delivers proven performance in vessels from 25 to 50 feet. This manual pump toilet eliminates dependency on electric systems, making it the preferred choice for traditional cruisers, offshore adventurers, and boaters who value simplicity and durability in heavy weather.

Built with cast iron and stainless steel internals, the GROCO K Series uses a two-diaphragm pump design that creates reliable suction and discharge with each stroke of the lever—no complicated electronics to fail at sea. The hand-operated mechanism is intuitive: pump the handle to draw water in, pump again to flush the bowl, then operate the seacock lever to manage through-hull discharge or holding tank output. The 22-inch width and compact 25-inch height fit snugly in tight cabin layouts, while the 54-pound weight ensures stable, vibration-free installation when properly secured to the cabin sole.

This unit suits experienced boaters who prefer mechanical simplicity and those retrofitting older vessels where space and weight distribution matter. Installation requires a through-hull fitting for intake and discharge lines, plus access to either a holding tank or direct ocean discharge (where permitted); consult local regulations for compliance.