The SaniBest Pro is a system that is used to install a complete bathroom up to 25 ft. below the sewer line, or even up to 150 ft. away from a soil stack. The SaniBest Pro can handle the effluent from a toilet, sink, bathtub, shower and washing machine (indirect connection). While most of our pump range consists of shredders/macerators, the SaniBest Pro incorporates an actual grinder system. The SaniBest Pro is ideal for situations where you do not control the use of it (i.e. rental unit, offices, warehouses, etc. The SaniBest Pro is designed to deal with sanitary napkins that may have been flushed down the toilet; such may consist of condoms, sanitary napkins, q-tips, dental floss, etc. The wastewater from other sanitary fixtures is discharged into the SaniBest Pro via two 2 in. inlets on either side of the housing. The discharge elbow on top of the SaniBest Pro can be rotated 360° depending on the discharge installation. A non-return valve (included in assembly) prevents back flow into the unit. This unit has been designed with a vent connection on the lid. All plumbing codes require connection to a vent system. Please note that the vent system should be a 2-way air vent. The uses of mechanical vents, air admittance valves or similar devices are not permitted as these are considered 1-way air vent systems. It is highly recommended for the system to be connected to a Ground Fault Interrupter (GFI) circuit.