The Saniplus is a system that is used to install a complete bathroom up to 12 feet below the sewer line, or even up to 150 feet away from a soil stack.
Installation is simple, there are just four connections. The macerator/pump is connected to the spigot of a horizontal outlet toilet. The toilet tank is connected to the water supply. The macerator/pump is connected to the small diameter discharge pipe work. The macerator/pump is connected to the electrical supply.
Saniflo systems are environmentally friendly because their toilet systems use less water than a normal toilet system. Ecology wise, the macerator could be seen as a primary sewage treatment system with a septic tank and/or municipal sewage treatment system as a secondary treatment system. Since the waste solids will now enter the sewage system in a liquefied state, they reduce the time and work done by anaerobic bacteria.
Here's a video that explains how to install a Saniplus toilet system: