Toilets are probably same 1996 year as the boat. Raritan told me they changed the Atlantis model to their, Atlantis Freedom, and discontinued all the Atlantis parts so I'm thinking time to upgrade them. Stick with same brand or ?????
You can't go wrong with Raritan toilets. I recently changed over to the Marine Elegance with fresh water.
‘I did the same, Marine Elegance with fresh water but installed an electric valve for switching to salt if needed. Had a manual Raritan on another boat for 14 years, good quality, easy to service.
Were still using ole 32v Crown heads on ole Bertie. Bomb proof. I have installed on customers boats the new flat-back Raritan head replacing their old GM stuff. Very quiet. Last install included the Blue-Tooth control panel per owners spec. Per the owner, programmable and you can work your head with your cell phone. I never opened the manual, was not interested in a 007 head. I just put the batteries in and hit the button, it worked and I was gone ♫♪♫
I will add that Raritan service and support for me over 46 years has been fantastic. For chargers and hot water heaters and heads Always responded with good advice.