I have noticed there have not been many posts regarding the use of PEX on the forum over the last few years, so I am looking for some updated feedback on a planned project.

We do not drink the water from the onboard system, but the goal for this project is to update the system and make as hygienic as we reasonably can.

I am planning to completely replace the original potable water hoses our boat. The water tanks are in good condition, but the original hoses and nylon fittings are brittle and showing significant internal algae growth.

I am considering a conversion to PEX A with expansion fittings rather than replacing the lines with traditional reinforced PVC hose and clamps. To minimize hidden fittings and potential leak points behind the cabinetry, the current plan is to use a home-run manifold system by the tank, with dedicated lines running directly to each fixture. The upfront cost of the expansion tool and the required mechanical knowledge are not obstacles, as I already own the equipment, have experience using it on residential projects, and likely have more than enough material on hand.

Could you please share your experiences if you have completed a PEX A conversion?
Thank you for your insights and time.