Solder fittings advice pls

[Stratf01]

When using solder ring fittings is it important to have one end of the pipe open to allow pressure and fumes to escape?

I had a terrible job trying to solder a short section of pipe with an isolation valve closed on each end. It wasn't till I redid the work and opened one end that I could get it to solder successfully.

 

[ShaunCorbs]

Was there water in the pipe ?

 

[Stratf01]

Was there water in the pipe ?

There was a tiny amount of water there yes. Could that have been the issue?

 

[ShaunCorbs]

100% yes as water would of gone to steam and pressurised the pipe need to keep an open end where there’s any water to steam / boil off

 

[Stratf01]

100% yes as water would of gone to steam and pressurised the pipe need to keep an open end where there’s any water to steam / boil off

That is very good to know for future.
So there should never be an issue with soldering a short run of pipe isolated at both ends?

 

[ShaunCorbs]

Nope aslong as there’s no pressure/ water