How to Double Flare Copper Tubing
A required step in making solid flare fittings is to double the end of the tubing. Fittings that are doubled are much less likely to crack or leak.

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HowTo7: Secrets to Making Flares - Ultimate Flaring Guide for Single and Double Flares

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How to do a double flare and a bubble flare with double flare tool

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HVAC/R Brazing Practice

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How to double flare brake lines

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bending copper tubing

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How to Straighten Brake Line TUBING with (Common Hand Tools)

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How to Solder a VERTICAL Copper Pipe Without It Dripping - The PRO SECRET Nobody Teaches!

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Swaging Flaring and Bending Copper Tubing

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Eastwood Line Flaring Tool Review -EricTheCarGuy

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How to Make Double and Bubble flares

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How to Double Flare a brake line. and WHY!

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Copper bending Demo- SAIT RACM

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It can be that easy! Perfectly flaring copper pipes / refrigerant lines

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The Complete Copper Rivet Magic With Viktor George's Stunning Rivets And Burrs! #diy #diycrafts

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