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Boy, I wish someone could answer this one too. I've been wondering about the check valves on my airplane. They are original from 1967. I've rebuilt them a couple of times, but the bodies are starting to show their age.
Rebuilding them is very easy. Most of the internals are stainless steel and don't ready show any appreciable wear, however the rubber components take a beating from the heat. The lower drain flapper takes most of the abuse.
Does anyone know where to find these? I've tried several places and no luck.
Richard
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