After researching this site, I bought two new Toto Drake II's to replace poorly performing units. After removing the first of the old toilets, I discovered the rough-in measures 10 1/2" from the wall and the Drake II will not fit. I thought the Drake II could be installed with 10" to 12" but it appears I was wrong. I emailed Toto over the weekend and I got a very prompt reply this morning, suggesting I use the CT474CEFG bowl with a 10" rough in, and retain the Drake II tank as it can be used with the new bowl.
It looks like I have two options:
The old installation used an offset flange, angling back and to the left. The basement below the bathroom is unfinished so I inspected the drain pipe in the basement and found it is marked 3". Most importantly, I discovered what appears to be the reason for the 10 1/2" offset flange location. Under the floor where a standard 12" flange would be installed, there is a double run of engineered I-beam style floor joists, about 5" wide in total. The original installer actually cut through the horizontal edge of the inside joist in order to install the drain pipe to the flange. Also, the flange is about 3/8" below the level of the tile floor. When the bathroom was tiled, they just tiled around the old flange. I noticed that when I removed the old toilet the wax ring didn't appear to have been compressed much, if at all. However, no leaks were evident.
What is my best course of action? Are there other options?
The other toilet location has a standard 12" rough-in so I don't anticipate any problems there. However, since that bathroom floor was also tiled the flange is likely low 3/8" there as well.
Thanks in advance.
It looks like I have two options:
- Exchange the Drake II for the CT474CEFG. If I go this route, will this bowl perform (flush) as well as the Drake II?
- Have the flange moved out to 12", but this may not be possible.
The old installation used an offset flange, angling back and to the left. The basement below the bathroom is unfinished so I inspected the drain pipe in the basement and found it is marked 3". Most importantly, I discovered what appears to be the reason for the 10 1/2" offset flange location. Under the floor where a standard 12" flange would be installed, there is a double run of engineered I-beam style floor joists, about 5" wide in total. The original installer actually cut through the horizontal edge of the inside joist in order to install the drain pipe to the flange. Also, the flange is about 3/8" below the level of the tile floor. When the bathroom was tiled, they just tiled around the old flange. I noticed that when I removed the old toilet the wax ring didn't appear to have been compressed much, if at all. However, no leaks were evident.
What is my best course of action? Are there other options?
The other toilet location has a standard 12" rough-in so I don't anticipate any problems there. However, since that bathroom floor was also tiled the flange is likely low 3/8" there as well.
Thanks in advance.
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