Explaining Toto's Class rating system for their performance toilets

Class I Installation
Residential, owner use installations such as one, two, and multiple family homes and condominiums.

Class II Installation
Transient use installations such as all lodging (hotels/motels) and offices with controlled or limited access.


Class III Installation, Power Gravity
Casual assembly use such as hotel lobbies, mercantile, industrial, school, dormitory, military barracks, churches and offices with public access.
The Toto Ultimate, Pacifica, Carolina


Class IV Installation
the Toto Ultramax, Drake, Vespin and Carlyle are rated Class IV, G-Max
Good enough for tough commercial jobs and quiet enough for homes.  
Great for kids.  

 

 

I consider all of these toilets quiet enough for residential use. 

 

 

Windows Media
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Quicktime
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Real Player
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A quick flush with wider 3" flush valve which is 2-1/4 times the volume of industry standard 2" flush valves.

G-MAX Flushing System: Commercial and high-end residential use.
This outstanding flushing system was designed for high-use commercial applications such as hotels and motels. Providing a quiet, extra powerful flush, toilets featuring the G-Max system are considered equal to pressure assist systems in performance, without the drawbacks commonly associated with these toilets, such as noise, high cost, and frequent repairs.

 

High head pressure to maximize flow rate

2 1/8 glazed, computer designed trapway

3 flush valve for high volume flushing

5 year limited warranty

Siphon jet action to assist performance
for efficiency


Power Gravity Flushing System: High end residential use.
TOTO toilets offering this flushing system blend a combination of features to provide an exceptionally high-performance flush.

3 flush valve for high volume flushing

2 1/8 glazed, computer designed trapway

Siphon jet action to assist performance
for efficiency

5 year limited warranty

The trapways on the high performance Toto toilets are 2-1/16" allowing a 2" ball to pass through.

 

 

 

Terry Love's consumer report on high performance toilets