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I think I might have figured it out? Could these two yellow post be what they call "check stems"? that are located on the lower valve section? If so the problem is solved....

error/duplicate response

Thanks for reply. I don't think the two yellow post are broken but when I lifted the head they fell into the top of the tank. I just didn't see where they go...it appears that they may just sit in...

I took head apart on my Kinetico because it wasn't cycling...wanting to clean it up...i found small yellow post just laying inside ...i haven't noticed these post in any pictures ...they have tiny...