TOTO GMAX surging issue

[cs2eye]

recently our GMAX filler in the tank keeps running after we flush the toilet. the flapper sits tight and then the GMAX fills the tank part way then stops, surges/stops, surges/stops, surges/stops, etc... until it reaches the full position. Question is- is this fixable or do i replace the whole mechanism? and if so with what and is it easy enough to do?

thank you!

 

[Jadnashua]

Check the seal, and if it has crud on it, wipe it off, otherwise, it's time for a new one. Check the Korky website for a video, and if you search, it's linked in at least a few messages here on this board. No tools, quick and easy, if a new seal is required, about $3 at HD or most hardware stores.

 

[Sponsor]

 

[Gary Swart]

It's the cap on the fill valve that is defective. Thee have a rubber piece inside that develops small holes. Easy and inexpensive DIY repair. You need to get a 528 cap. HD should have them.

 

[Terry]

TOTO uses at least three different fill valves in the tank.
Some are repairable, and some you just replace. A good replacement valve is the Korky 528MP

www.terrylove.com/korky

Korky 528T Replacement TOTO Toilet Fill Valve - Fits G-Max and Power Gravity Toilets -Easy to Install -Made in USA