Jabsco Manual Marine Toilet (Twist-N-Lock) – Compact Boat Toilet with Hand Pump

The Jabsco manual marine toilet is one of the most popular and trusted marine heads worldwide, valued for its durability and straightforward operation. Refined over years of production, its design is built to withstand the rigors of the marine environment while providing comfort and safety in use.

A key feature of this model is the Twist-N-Lock pump system. This patented mechanism allows you to lock the pump plunger down with a simple twist of the handle. By doing so, you prevent any unwanted backflow of water or waste into the bowl during rough seas or when the boat heels – a crucial safety feature that protects your vessel from flooding and eliminates nasty odors. During normal use, the pump strokes smoothly and efficiently: a few handle pumps bring in clean rinse water and expel the waste.

Compact Size, Versatile Installation: The Jabsco Twist-N-Lock toilet has relatively compact dimensions (approx H=13.5", W=17.7", D=16.7"), making it easier to fit into confined head compartments. Nevertheless, its design provides a comfortable seat height and a sufficiently sized bowl for user comfort. It can be installed above the waterline (e.g., on a higher deck or platform) or below it – such as in the bilge area of the hull. If installing below the waterline, it’s vital to fit a vented loop (anti-siphon valve) in the discharge hose (and optionally in the intake) to prevent water from siphoning into the boat when not in use.

Rugged and Reliable: The toilet’s bowl is made of true vitreous china porcelain, which resists staining and odor retention and can withstand harsh cleaning chemicals. Hardware and fasteners are marine-grade stainless steel, and the pump cylinder and valves are crafted from corrosion-resistant plastics. Every component is chosen to endure saltwater and frequent usage. Jabsco also designed this unit for easy maintenance – service kits (seals, valves, gaskets) are available, allowing boat owners to refurbish the pump mechanism without replacing the entire toilet.

• Ideal for Small to Medium Boats: With its compact footprint and zero power requirement, this toilet is an excellent choice for smaller powerboats and sailing yachts (up to ~35–40 ft). Crews of such vessels appreciate its simplicity and the fact that it operates independently of the electrical system.
• Great Backup Head for Larger Yachts: On larger yachts (over 40 ft), the Jabsco manual toilet is often installed as a second head or emergency backup. In case an electric toilet fails or power is lost, the manual unit is always ready to use, ensuring you’re never without a functioning toilet.
• Easy to Service: If maintenance is needed (e.g., replacing seals or a joker valve), the entire pump assembly can be quickly disassembled with common tools. Jabsco’s service kits include all necessary gaskets and parts – it’s wise to keep a kit on board.
• Practical Tip: After use, always twist the handle to the “Lock” position – this prevents any accidental ingress of water while underway. Also, periodically flush the system with fresh water to reduce salt and scale buildup in the pump and hoses, which will keep the toilet pumping smoothly.