I have 3 of the 525SS faucets on my long draw set up and they seal just fine. The only caveat is that I am using beer pumps that push the beer at 30psi to the faucet. That might make a difference who knows? I am thinking of switching to Ventomatics now that they are being made again. The reason is that I leave them with beer in the line for a week or 2 at a time unattended. It would suck to have 15 gallons of beer go down the drain due to a leaky faucet. Not to mention the fruit flies.
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http://www.chicompany.net/index.php...d=3277&zenid=f8a48f4b97525eecb0a9c94d7ac74683