Toilet running constantly due to hard water flapper damage
Why it happens here
Diamond Bar's water leaves mineral deposits on rubber flappers, making them stiff and unable to seal. After three to five years, the flapper warps and water leaks through. This is the single most common call we get in the area.
Our approach
We replace the flapper with a Korky or Fluidmaster model that resists mineral buildup. We also check the fill valve screen and clean it if needed. For homes with severe hard water, we recommend a yearly tune-up to stay ahead of it.