Today I installed a new ballcock, the Fluidmaster Fill Valve. All is fine and dandy except one thing. Even at its highest setting, it still leaves much less water in my tank than the previous unit.

So I was wondering if there are any known solutions? For instance, does anyone make an extension platform that acts like a bigger washer? Or, and I don't know the physics of flotation well enough, but would perhaps weighting the floater cut off do the trick?

Am sure I must be asking something that has been asked a million times before.

Please, if it's not obvious by my post, I am a layman, so please leave me any answers using words and terms I can understand ;-)

Thanks ahead of time,