: Im having trouble soldering my last joint on a shower installation. The solder just wont flow into the joint. Can I unsolder the joints above to remove this piece so it can be recleaned and fluxed to try again or do I have to cut it out and start again? (I should have called a plumber)The easiest thing to do is to cut the joint out and restart. Just make sure it is very clean, you are using flux, and that there is no water in the line. If you are having trouble keeping water out of the line, stuff some bread into the line. Then hurry and solder. The bread will soak up the water and eventually dissolve.