Looking for recommendations for Porta Pottie with MSD

[Project_Mayhem]

I don't have any first-hand experience with winterizing marine heads. But vinegar can freeze. I did have a foot pump for the sink in the galley freeze and bust... ever since that experience, I put some of the pink anti-freeze in my pumps. My best guess would be to run some anti-freeze through your head and then pump it out before winter.

My boat is kept in heated storage over the winter. meanwhile I have to suffer through these cold winters haha

 

[Leeward Rail]

Any 2026 updates on preferred msd portapotties ?. I installed a Visa 18L model just before I sold our previous boat. I see them still for sale, but have no idea how they hold up over time. Current boat has a 13 gallon holding tank, and seriously considering getting rid of it for an MSD Potti again.

 

[Project_Mayhem]

I had two or three porta potties on my previous boat. They all ended up stinking, no matter what I used to treat them. I now have a traditional setup and the head rarely stinks. All the porta potties also developed a leak of either fresh or waste water after a year or two