All,

 

I have both a single and a double 37 degree flaring tool and have experimented with both.  (FYI – for those not familiar with it, the double flaring tool, first collapses/rolls the tubing inward and then expands it outward to essentially make a double wall’ed flare.)

 

I understand that many/most builders use the single flare and it generally works fine.  However, the double wall’ed flare looks stronger with less likelihood of a crack/leak.  I’m looking for any insight/experience regarding double vs single flares.

 

Rick Titsworth

ES-building