2 separate units leak pressure

I am on my second one. The first one will not hold pressure at all. It would come seeping out of the top where the pump would go into. I returned that and got another one thinking it might just be a rare thing. The second one I got holds pressure a little but it's hissing out the top again. From reading other reviews, which I should have done earlier, it seems to have a defect with the seal.

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