Toto Drake toilet bowl won't fill completely? Here's an easy fix...

I've installed several Toto Drake toilets over the years and they've always performed well, UNTIL RECENTLY when the toilet bowl on a recent install wouldn't fill completely.

I spent A LOT of time trying to figure out what was wrong. I've checked that the floor was level, I tried adjusting the fill valve and got it set up exactly the same as another Toto Drake toilet in our house (which didn't have these problems). I could not diagnose or figure out why this bowl wasn't filling! I wasn't sure if it was a defect with either the tank or bowl.

I searched and found various solutions in forums and other YouTube videos, but none of these suggestions helped me.

I finally shot a video (similar to the one you see above) and sent it to Toto Customer Service. About a week later, I got an email response telling me the problem: the black fill tube (coming off the fill valve) was supposed to go into the larger white flush valve tube and NOT into the tank.

As soon as I made this simple adjustment, it fixed the problem.

This is the toilet in the video: https://www.totousa.com/drake-two-pie...

Good luck!