PattyD wrote:
It’s either a Briggs or a Case ballcock. Both are gettinhttp://www.masterplumbers.com/forums/forum_images/post_button_bold.gifg hard to find but I think someone is making aftermarket replacements. Find out which it is and check Fluidmaster for a possible replacement.
Agree with the Fluidmaster replacement float valves (and you might as well replace the flush ball with a new flapper valve at the same time). It’s an easy DIY fix.