Ok, I have replaced 4 VacuFlush systems in our boats. I put In Raritan Marine Elegance heads. This is the only head I would recommend. It is a macerating head so you aren’t flushing chunks down. Therefore you can use either 1” or 1.5” discharge hose. In our current boat the discharge hose is 36’ long. By using 1” hose it will hold about 1.5 gallons. With 1.5” hose it would hold about 3.4 gallons. With 1” hose there is a huge water savings when you want to flush the hose clean after pooping. I actually ran the 1” hose inside the old 1.5” hose, saved me a couple of days work and took 57 minutes. The ME head can come with a smart flush panel that lets you pick how you want it to flush, normal, short flush, add water or dry flush. This really helps to save water going into the holding tank. All of the mechanical parts are in the head not spread out in the boat. Only thing not in the head is the circuit board to control it.
If you are replacing the heads then now is the time to replace the discharge hose too. ONLY use Raritan SaniFlex hose. ONLY. It is very flexible so it is easier to work with. It also comes with a warranty against permeation, read smell. Defender sell it by the foot and had the best price last time I checked.
You can get the ME head in different configurations. They have elongated seats, tall heads, short heads, heads with slanted backs or straight backs so you can pick one that will fit. We bought a 24 volt one this time since I have the thruster bank next to the head , made it easy to get power to the head. They also have a Bluetooth option.
And you ABSOLUTELY want to go with a freshwater flush. Although the ME can come with a switchable water supply, fresh or seawater. It is more money and more complexity so I stick with just the freshwater flush.
