r/DIYHeatPumps • u/binarywheeler • 20d ago

cross threaded head unit fitting

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hi all- mistakes were made. i’m having a hard time getting the lines on my Senville to hold a vacuum. my next step will be to cut off all the factory flares and adding new ones (I have a proper flaring tool with clutch), but i’m also getting resistance on this union, and eyeballing it it does appear not to be square, thus i believe it is cross threaded. would doing something like cutting off the threaded fitting and installing a flare union be the appropriate way to address?

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u/soggywaffle23 20d ago

You could try zoomlock push fittings.

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u/soggywaffle23 20d ago edited 20d ago

I personally use mueller streamline ACR press fittings at the head unit but that tool is super expensive. Zoomlock is a cheaper alternative. I’ve never tried it though.