I need troubleshooting help.

This is my third filter purchase and I have been completely satisfied up till now. I ordered the same filter I got last time and It was slightly different from the one I had before . I put it in and I cant get the water to flow out. Hopefully Apex can get a hold of me or maybe I can contact them but this filter isn't working for me right now. When it comes to past products, the water taste amazing it is great. I use this filter because I have really bad acid reflex and this helped a lot changing the PH level to a tolerable amount I could drink and handle.

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