Steve,
I also have the Davo Pro-Chek installed. I found the same information you quoted, but nothing more. Even the Davo website is silent on the product. There are a few mentions of the product on the web, but nothing about how it might actually work. There are even some comments from "diesel mechanics" suggesting it does not work and they just remove it if ever a hose leaks or there is a fuel issue. I think I will send an email to Davo and ask for additional information - it can't hurt. If I get anything I will post it in our new files section. It may be invovled with the removal of the tiny fuel bubbles that Davo says are normal in any fuel filter that operates under a vacuum. More later.... Russ
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