TOTO 528 trouble

[Greg925]

Hi. I've got an OEM green-topped Toto 528 in my toilet. It's recently started to run all all the time as though the water line were set too high. I popped the green piece off to watch, and the float seems to engage, but maybe it's not fully closing the valve? If I press down slightly between the hinges, it seems to slow a bit - I think because I'm putting more direct pressure on the valve. Maybe there's a worn out gasket?

He's a couple photos so you can see what I'm working with. (I've currently got the shut-off valve closed to stop wasting water).

Do i just need a complete replacement valve, or is there some adjustment I can make? (Is there a user serviceable gasket?) Any input would be appreciated.

Thanks!

 

[Terry]

You can try replacing the cap, R528

That would be the quick and easy fix. If that doesn't work then replace the fill valve, either a Korky replacement of a Fluidmaster.

 

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[Breplum]

More often than not, it is the black float which has a poorly designed tiny rubber gasket.
Unfortunately ,they don't sell a float...so buy any cheap new Korky or Hunter even Toto (which is same but expensive, pinch the float off and swap out.