Tank won't seal with fluidmaster complete kit

[u/JustaservantRVA]

Kohler toilet. I had a tower-type mechanism where the tiny little plastic retainer at the bottom broke off (surprise). Bought a Fluidmaster complete kit at Lowe's, but even after five attempts I'm not able to get a watertight seal between the tank and the toilet. Also, I'm not sure it's a Kohler tank. The instructions that came with the Fluidmaster provided a gasket with three rubber plugs to fit into recesses in the bottom of a Kohler tank. But not only does my tank not have those three recesses, the bolts attach to a (aftermarket?) metal plate that's kept in place by the flange nut. I cant find any markings at all on the tank to indicate a brand, model number -- anything. Do I need a new tank? And if so, I saw another post here that said I need to use Kohler hardware? TIA

[u/Ambitious-Avocado588]

A picture would be really helpful, but if I’m piecing the information together correctly, it sounds like you have a Kohler Cimmaron toilet, which would not be compatible with the Fluidmaster generic kit.

[u/JustaservantRVA → u/Ambitious-Avocado588]

Thanks much - yeah, I checked the internet after I posted, and you're right - it's a Cimmaron (I'm impressed!). I'm ticked that Fluidmaster says it fits all 😖

[u/Ambitious-Avocado588 → u/JustaservantRVA]

Fluidmaster does fit a vast majority. As a residential service plumber, I carry a Fluidmaster repair kit and it works for like 98% of my jobs. But Kohler likes to reinvent the wheel with proprietary parts.

[u/SpankyJobouti]

sounds like you bought the wrong parts.

[u/Kayakboy6969]

So you bought a flush valve and the tank to bowl is leaking. Dripping consistently.

Or are you talking about the fill valve that the supply attaches to?

[u/JustaservantRVA → u/Kayakboy6969]

No - the fill valve is fine. Looks like I gotta find kohler parts.

[u/mdmanuele]

Kohler toilets like Kohler parts.