How To Do A Double Flare

A double flare is a type of plumbing fitting that allows you to connect two pieces of tubing together. It consists of a nut and a flared end. The nut is threaded onto one end of the tubing, and the flared end is inserted into the other piece of tubing. The nut is then tightened, securing the two pieces of tubing together.

How To Do A Double Flare

There is no one definitive way to do a double flare, as there are a few methods that can achieve the same result. However, the most common method is to use a tubing bender to form the tubing around a mandrel, then use a pipe wrench to tighten the flare nut. Another method is to use an inverted flaring tool to form the flare nut on the tubing end, then use a cheater bar to tighten the flare nut.

-Tape measure -Pipe wrench -Channel locks -Propane torch -Rag -Anti seize lubricant -Shop cloths -Safety glasses

  • Take the piece of tubing you want to flare and hold it so the end you want to flare is pointing downwards
  • Apply pressure
  • Take the other end of the tubing and hold it perpendicular to the tubing you are trying to flare

There are a few things to keep in mind when doing a double flare: First, make sure that the inner and outer tubes are properly aligned. If they are not, the flares will be crooked. Second, use a lot of lubricant. This will help the tubes slide past each other and create smooth flares. Finally, be patient. It takes a bit of practice to get the hang of doing a double flare correctly.

Frequently Asked Questions

How Do You Double Flare A Brake Line Without Tool?

One way to double flare a brake line without a tool is to use a bench vise.

How Do You Flare A Brake Line Diy?

There are a few ways to flare brake lines. One way is to use a brake line flaring tool. Another way is to use a pair of pliers with a copper fitting.

How Do You Double Flaring?

Double flaring is a technique used to flare tubing twice as much as a single flare. This is done by heating the tubing until it is red hot and then quickly bending it around a forming tool.


A double flare is a technique used in metalworking to create a flared tubing end. The end of the tubing is heated and then drawn over a flared die. This forms a tight seal and creates a flared end.

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