Choosing a marine toilet replacement

Identify what is already fitted

A replacement toilet needs to suit the space and existing onboard system. Start with the make and model, then photograph the whole unit, its base, water connection and waste outlet. Include a label on the motor or pump if the toilet is electric.

If the request is for a different type or a new installation, describe the intended arrangement. A compact bowl, a matching voltage or a similar appearance alone does not confirm that the unit will fit.

Choose the arrangement first

Manual or electric

State which operation you want and what is fitted now. For an electric replacement, confirm the available voltage from the existing equipment and vessel supply.

Fresh water or raw water

Identify whether flushing uses the onboard fresh-water system or water drawn from outside the vessel. These are separate model choices, not interchangeable descriptions.

Bowl and base space

Measure height, width and depth, the mounting position and clearance around the lid. Allow access for the pump and hose connections as well as the bowl.

Connections and route

Record inlet and discharge hose sizes and show the pipework direction. Include the route to the existing holding tank or discharge system and any relevant lift.

Example: compact versus regular bowl

Jabsco’s Quiet Flush E2 range illustrates why checking dimensions matters. Its July 2025 brochure lists both 12 V and 24 V versions, with fresh-water or sea/river/lake-water rinse options.

The E2 technical sheet lists a 19 mm bowl inlet and a 25 mm waste discharge, with a 38 mm adaptor option. These figures are specific to that range; other marine toilets can use different connections.

Its base and discharge arrangement also offer different orientations. Even where the overall bowl size is suitable, check that the proposed configuration leaves room for the existing hoses.

Make the replacement requirement clear

Tell us whether you need a complete toilet, a pump assembly or a service part. If you are reporting a fault, describe what happens during flushing and identify the existing unit before requesting a replacement part. Add the vessel location and required date so the quotation can address your schedule.