If it is installed properly it should never leak.That would be my concern as well. The fit would have to be perfect. Looks that way in the photo, but I'd definitely want a solid warranty. It would not be a pleasant experience to get their product installed and then discover a new leak. Suddenly both the installer and the supplier are pointing fingers at each other. Not saying leaks would be an issue, but I'd want an assurance from both supplier and installer. JMO.
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