This Solder joint might leak later?

[james1100]

Hello
I just got new water heater installed by a reputable plumber in my town. I noticed a tiny gap on one of the Solder joints and started to worry this might leak later. I would appreciate if any plumber can give an advice. If that's going to leak eventually, should I ask my plumber to do pipe again right away? Thanks for your help in advance.
The first picture shows a gap, the second picture is the other side view of that joint.

 

[hj]

The "filet" is NOT the part that seals the joint, so a gap there, unless it indicates a much larger one inside the joint, is irrelevant.

 

[Sponsor]

 

[Kreemoweet]

You can't tell by looking at the outside of a solder joint whether it will "eventually" leak or not. That's why soldered piping installations are
put under actual pressure test prior to being placed in service. It's rare for any solder joint that tests OK to start leaking prior to the expected service life of the pipe system.

The tiny little "gaps" you show are extremely common in soldered piping systems, with no leaks.

 

[Dj2]

The joint in the pictures looks decent to me too.
Usually, I use a rug around the joint while the solder is still hot, to ensure a complete seal.