The Drake and Eco Drake
ST743E, Watersense 1.28 gallon
ST743S, 1.60 gallon
The Drake II with double cyclone
ST454E, Watersense 1.28 gallon
My toilet rebate program is very specific in spelling out the tank and bowl product codes. Often in an ad the EcoDrake II, for example, will say that it's a CST744, which is the number of the bowl, but it won't specify the number for the tank, so I wonder if that is standard, or do I have to buy them separately?