Toilets, Manual & Electric, Fixed Mount & Parts

Marine Heads: Choosing the Right Toilet for Your Boat

A reliable marine toilet — often called a "head" — is one of the most essential comfort systems aboard any vessel. Whether you're day-sailing on a small centerboard or cruising offshore for weeks at a time, onboard sanitation demands equipment built specifically for the marine environment: sealed against saltwater intrusion, rugged enough to handle rough seas, and compliant with U.S. Coast Guard Marine Sanitation Device (MSD) regulations governing how and where waste can be discharged.

Fixed-mount marine toilets fall into two broad categories: manual and electric. Manual toilets use a hand-operated pump mechanism to draw flush water through the bowl and push waste overboard or into a holding tank. They require no 12V or 24V power draw, making them attractive for sailboats and smaller powerboats where electrical loads are closely managed. Electric toilets use a motorized pump — typically powered by the vessel's DC system — to handle flushing at the touch of a button or foot switch, delivering a more home-like experience below decks.

What to Consider When Shopping

• Power source: Manual heads need no electrical connection, while electric models run on 12V or 24V DC. Confirm your boat's system before buying.
• Bowl size: Compact bowls suit tight heads compartments, while household-size bowls offer more comfort in larger installations.
• Above or below the waterline: Both types can be installed in either location, but hose routing, vented loops, and anti-siphon valves differ by placement.
• Discharge configuration: Waste can be routed overboard (where permitted by law), through a Type I or Type II MSD treatment device, or into an onboard holding tank (Type III MSD) — plan your plumbing layout before selecting a unit.
• Parts availability: Rebuild kits, joker valves, seals, and pump assemblies extend toilet life significantly, so choose a brand with strong parts support.

Top Brands in Marine Toilets

Jabsco is widely recognized as the world's leading manufacturer of small-craft marine toilets, offering exceptional quality and value in onboard sanitation. Their lineup spans the iconic Twist 'n' Lock manual head — a worldwide bestseller for decades — to the Lite Flush, Quiet Flush, and Deluxe Flush electric series. Jabsco toilets are designed for ease of installation and service in confined spaces, and the brand offers a comprehensive range of rebuild kits and conversion kits, including manual-to-electric upgrades.

Thetford is the world's leading manufacturer of mobile sanitation products for the RV and marine markets, with a history dating back to 1963. Their marine-focused Tecma line — including the EasyFit and Silence series — is celebrated for its innovative macerator technology and sleek European design, delivering quiet, water-efficient performance. Thetford's Nano Eco and Compass series round out a broad offering that covers compact and household-size installations alike.

Sealand (now a Dometic brand) brings decades of marine sanitation expertise to fixed-mount toilets and replacement parts, offering options well-suited to boaters who need dependable, straightforward sanitation solutions backed by a major global marine brand.

Groco has been building quality marine products since 1918, and their HF and K Series toilets reflect that heritage. The HF Series features a sturdy bronze base designed for rough-water use with a high-efficiency valve system, while the K Series offers a household-size bowl with a 3-inch piston pump mechanism and an all-bronze pump — available in both hand-operated and electric models, with quick conversion between the two.