: I am trying to install a new water inlet valve, or ballcock if you will, into a Kohler toilet (Kohler calls it a float
: valve). It looks like a Fluidmaster fill valve, only it is a little longer since the tank is higher than normal. No
: matter how loose or tight I tighten the plastic nut on the bottom of the valve body that holds the
: valve to the tank I get a leak. There does not appear to be a crack in the tank or in the valve body. I even
: tried using two different kind of washers, a cone shape one and a flange kind that came with the
: replacement fill valve, but no luck. Any suggestions?