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Delta cartridge for double-handled faucet will not seat properly.

The new Delta cartridge for my double-handled faucet will not seat properly and I cannot screw on the bonnet. I tried the old cartridge and, to my surprise, it also would not seat! I did not buy a new spring and top, but they seem in good condition and I can't imagine this is the problem.

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Steve Pack

Steve Pack

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  • Delta Master
  • 6,355 Answers

There a little plastic tab on the cartridge that will line up with a notch in the valve body?...allowing it to go all the way in

Posted on Mar 06, 2022

Testimonial: "Thanks, I've matched the notches, but it still will not seat."

  • Steve Pack
    Steve Pack Mar 06, 2022

    did seat come loose.. I use a Phillips screwdriver and place seat on it and use it to hold seat while install it and then I press the seat fully down using my thumb or forefinger.
    https://www.youtube.com/watch?v=lXa78YsP...

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