I second the Lavac choice. We put a Lavac in the forward head almost 3 years ago, and have been full time liveaboards since that time. We have not had a single clog, and have done NO maintenance on the toilet since new. I've use many different brands of toilets in the other 6 boats I've owned to include manual and electric, and nothing has come close to the reliability of this toilet.
The head has a seal on the underside of the lid, and creates a vacuum as you pump. It has a very reliable Mk5 Henderson pump which I have mounted on the aft wall near the head to flush. It is just a simple and bulletproof design with very little that can go wrong. They have an option for an electric motor to drive the Henderson pump, but I prefer the simplicity and reliability of the manual pump.
Santa Marta, Columbia
My hull is 1998, came to me with 2 manual heads. Changed the forward one with Jabsco electric toilet conversion 29200-0240 in 2012. Worked well, changed all the seals, standard jabsco kit, in June 2017. Only complaint is noisy by night. I never used sea water and no smelling at all
N'EVEREST Super Maramu 185
now in Sarzana Italy
Hi Ian and Margaret,
We have our original electric heads in service after 17 years. Very little maintenance, certainly less than the manual ones we have used in the past. What is important is to flush for at least a count of ten each time--not for the benefit of the machine itself but to make sure that you always have clean water in the pipe leading up from the toilet.
Ian and Judy, Pen Azen, SM 302, Corfu
Our SM has two manual heads, both Jabsco. We are looking at Installing Jabsco Quiet Flush Electric Heads. They seem to fit the SM head floor pan cut out nicely. Any opinions on number of electric heads? Two electric or one+manual? Other things we should consider?
Ian & Margaret
Loca Lola II
New River, Fort Lauderdale, Florida