I put on the Fumoto yesterday, I'm using the blue fiber washer and the long nipple version, F108N. No drips or seeps yet and if it does I'll change to a factory crush washer. I'd say there is almost 2" of clearance between the bottom of the nipple and the bottom of the plastic cover. Even without the plastic cover I'd say it's at least an inch above the metal framework. Just sharing the experience.