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Q-talk 117 - Fuel "O" ring issues

My QAC supplied fuel valve is mounted on the bottom of the header tank. Last month the o-ring seal on the fuel switch failed and gas started dripping onto the canard. QAC plans call for extra thick epoxy on the canard below the header tank and I had also installed a "dam" that does not allow fuel to run down the length of the canard but forces it to the rear and out a hole in the bottom of the aircraft.

The valve has a large nut that has an o-ring seal around the shaft. It lasted 20 years and 1000 hours before leaking. We may want to consider putting this item on a 10 year replacement cycle for the o-ring.

Mike Dwyer Q200 N3QP http://www.geocities.com/fly-home/

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You can order a printed copy of Q-talk #117 by using the Q-talk Back Issue Order Page.