: I have a Gerber toilet that continues to leak water from the tank into the bowl. I have replaced this flapper 4 times with different flappers. All with the appropriate size and the last one from a plumbing shop guaranteed to fit a Gerber. Any suggestions on this problem. Thanks..Gary, if its a newer gerber 1.6 gal there is only one flapper that will work. you must use the original flapper from gerber. we have tried every other flapper that looks like it will fit. the gerber part # is 99-523. If you cant find it e-mail me and I can help you get one. Good luck Scott scottbryan@plumbingpartsdepot.com
