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Re: How small of a leak will dye show?
Posted to HVAC Forum on 6/2/2019

Did you replace the Schrader valves? I have seen leaks there that don't show dye. I always replace them every time I hook up to a system for the first time. Had too many leak after being touched for the first time in years.

Also, my technique with the sniff... Login to read more.