The Gerber uses a Flushmate pressure tank.
You can find the online manual here
I have a Gerber Ultra Flush (#21-302) that is ~12 years old. It is beginning to show symptoms of a flushing problem. Oftentimes, the first flush makes a lot of noise and moves a little water, but is not sufficient to do the job. A second flush is required after letting the system recharge. It appears that this happens most often after a long layover between flushes, as if it is "losing its charge". If the toilet is used once and then used again after a few minutes, this problem does not occur (i.e., only 1 flush is needed).
Questions: (a) How long should I expect this type of toilet to last? (b) Is it possible to guess what might be the problem? Any suggestions on how to further diagnose? (c) Can I perform the fix myself?
Thank you. Any gut feel for what is wrong?
By the way, you look like James Roday from the TV show "Psych".
What ever happened here?
I have the same problem. I have replaced the cartridge and cleaned the vent valve.
I had the same problem. My fix was to get a new toilet.
If the serial number doesn't indicate a potential problem, Flushmate tech support can help you pinpoint the most likely cause. You can call the number on the tank (east coast business hours) or send an email through the Web site.
Hope this helps.