Just updating my review after using it during the air conditioning season and then leaving it on all winter for the heating season. Found all 3 valves to leak at the slightest pressure after sitting all winter. I poured in some oil, it seemed to help a little. Hopefully it's just because they haven't been used in a while and the seals just need to swell a bit. I also hope to still be able to use them to get the vacuum out. It seems that for the price they should be of the best quality and a well known brand.
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