What blow torch you using?

[billybob150811]

have a tx504 American brand small hard flame will solder if theres a tiny bit of water in the pipe
small flame handy for close work

 

[Ben-gee]

Nothing will solder whilst there is water in the pipe as it only allows the joint to heat up to 100 deg C, whereas solder melts at about 230 deg C.

The solder will only run once the residual water has turned to steam and left the vacinity.