Visual inspection is somewhat overrated in my opinion concerning the Racor's and definitely not worth the trade off of the mess they create when changing, especially underway. If you have vacuum gauges with a drag needle and solid filters that have drains, it's a simple process to open and drain a few drops into a tupperware container and examine for water and crud. I removed my racor and replaced with filter heads and run solid spin on filters now with drains.
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