My soldered joints no longer seem to be able to hold (french is higher) water pressure. New copper pipe, cleaned the joints with stainless steel scourer, used some english flux, used english solder, changed that to use French solder. Heated the joint and let the solder run in to the joint. Left it till cold to touch and the fuckers seem to leak usually after about 12- 24 hours.
My soldered joints no longer seem to be able to hold (french is higher) water pressure. New copper pipe, cleaned the joints with stainless steel scourer, used some english flux, used english solder, changed that to use French solder. Heated the joint and let the solder run in to the joint. Left it till cold to touch and the fuckers seem to leak usually after about 12- 24 hours.