Flush valve seal deterioration due to bleach

[DMY]

I have replaced 3 fill valves in just a few years on my 3 Toto toilets. Wondering if this is because I use bleach to clean bowls ?

 

[Reach4]

I have replaced 3 fill valves in just a few years on my 3 Toto toilets. Wondering if this is because I use bleach to clean bowls ?

No. Cleaning the tanks with bleach could potentially hurt fill valves, but cleaning the bowls can not.

What fill valve are you using?

Some fill valves have replaceable seals.
Here are the replacement seals for Fluidmaster and Korky:
https://www.fluidmaster.com/products/toilet/fill-valves/242-toilet-replacement-seal/
https://www.korky.com/products/fill...cessories/replacement-cap-assembly-fill-valve