Another Thermostat / Housing question.

RedFish said
here's a silly question... What difference would it make? I can't imagine the small amount of water slipping past it would make a difference. You wouldn't need to drill a small vent/bleed hole in it either.
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The more I looked at it the T-stat bearly covered the hold on the housing. it would have taken way too much RTV to stop it from moving.