repairing 1-piece toilet - flush valve

bella_trixDecember 17, 2006

I have a one piece american standard toilet that is constantly leaking water into the bowl. Without realizing it was a one piece, I went out and bought a complete fluidmaster repair set and decided to replace everything. I was mighty surprised when I got to the "remove upper section of the toilet" part and discovered it was all one piece. I then replaced everything but the flush valve to see if that would fix the problem. It didn't. The toilet appears to be leaking where the flush valve meets the porcelain. So how do you replace a flush valve on a one-piece toilet? I can't even figure out how to remove the original flush valve, let alone install a new one. I'm at a loss. If it helps, the original flush valve says "Hunter" on it. HELP!



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Did you ever figure this out? I'm having the same problem with my A/S Hamilton 1-piece. It also has the "Hunter" flush valve.

    Bookmark   January 2, 2007 at 3:31PM
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Is this what you have? I found this info on

Here is a link that might be useful: hunter flush valve

    Bookmark   January 2, 2007 at 6:20PM
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Apparently, one piece toilet flush valves need a special wrench that you use with a ratchet. If you buy a new flush valve, it comes with the wrench (glorified piece of plastic) and is not too difficult to get the flush valve out. I bought the replacement at, who was conveniently down the street from me. They do mail order, too. All you need is the toilet type - a four digit number embossed in the tank starting with a 2.

Unfortunately, after replacing everything, the toilet still leaks. The plumbing parts guys gave me some ideas to try to fix it, but it looks like there's a defect in the porcelain that isn't allowing a proper seal. I haven't had the energy to have another go at it, but pretty soon I'll be trying a nail file and plumbers putty. Wish me luck!

    Bookmark   January 2, 2007 at 8:16PM
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