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Thread: To Drill or Not To Drill Thermostat
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Old 01-03-2011, 07:41 AM
ap72 ap72 is offline
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I always drill one 3/16" hole when I install a t-stat, any more than that and you're defeatting the purpose of a t-stat, anyless and you can get air pockets.

High system pressure, high flow, about 30% antifreeze has always worked very well for me.
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