[Shop-talk] Sweat joint leak

[Steve Shipley]

>Like others have said, there is still water in the line that is
>absorbing all the heat.

I just went through this.
First you use a propane torch and you can't get enough heat because of the 
water.
Then use your acetylene torch and you can't get enough heat because of the 
water.
And then you replace the fitting and you can't make a joint because now you 
got the joint hot enough but there's enough water there to ruin your joint 
because the steam keeps the solder from flowing around the entire joint.
And then you replace the fitting with another fitting but you make an extra 
effort to get the water out of the line.

Lesson learned: Joints need to be dry and clean

Like a lot of shop procedures, it's easy when done right, and impossible 
when done wrong.

I'd never used those pre-soldered fittings before and they work great.