a small 2mm hole will clog with it's own homogenous rust, and the capillary action of weater willl prevent flow. so it needs to be a bit bigger than that i'd say. 3mm :)
@Dylan started
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a small 2mm hole will clog with it's own homogenous rust, and the capillary action of weater willl prevent flow.
so it needs to be a bit bigger than that i'd say. 3mm :)