I'm putting in a new water heater in my travel trailer. It's been a long time since I've used a flare tool, and I cant seem to get a leak free connection. The first time, I didn't chamfer the inside of the tubing and the flare looked terrible. After several attempts, I got a better looking flare, but it still leaks.
The flaring tool I am using is a cheaper one from Home Depot, and there is some copper build up on the tool from previous attempts. Could the copper that has been deposited on there be the problem?
I went so far as to lube the tool, hoping to cut down on galling the inside of the flare.