toto gmax, bubbles near stem base - normal?

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darocodiglia

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Have a Toto toilet that has worked flawlessly for 3 years.

Before last week, a flush typically sounded like a big whoosh, then a few seconds (at most) of quiet tank-filling sounds, then a crisp shutoff and nice silence.

Starting last week, although the toilet seems to be functioning perfectly well still, it sounds different. Now, instead of a few seconds of quiet tank-filling sounds, we get say 15-30 seconds of louder tank filling sounds.

Opened up the tank cover and watched the flushing process. Everything looked normal as far as I could tell (am not too familiar with exactly what is supposed to be happening, for this type toilet).

But during the 15-30 seconds of (now noisier) filling, I saw some bubbles arising from down near the base of the stem of the GMax 528.

My question: are the bubbles normal, or could they be a symptom associated with our recent change in flush sounds?

I removed the GMax and disassembled it, rinsed it all off, and reassembled it. Nothing seemed out of the ordinary and the "problem" (longer fill-time; and bubbles unless they are normal) has not gone away.

Any suggestions for the next troubleshooting step to take?
 

Jadnashua

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It won't hurt anything, but you can probably restore it to 'normal' if you replace the cap for about $3, available at Lowes or your local plumbing supply store.
 
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