I don't know what type of solder I should use. It is dependent on the use of your pipe. If you're soldering drainage pipe you can use 50/50 solder, but if you're using it for drinking water you need the 95/6 type. Lead and other things can get into the water of the 50/50, but the other doesn't.
Let's Get It Fixed!
Our virtual experts can diagnose your issue (for free!) and resolve simple problems.