
I used my hammer drill and a chisel to remove concrete until I found the water line.
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After sweating in (soldering) a new peice of pipe, I learned two things.
One, it is VERY difficult to get a 100% watertight solder joint when working in a hole. Two, according to several people in the r/handyman subreddit, solder joints in cement WILL fail due to the chemistry of the cement vs the solder. Those two things implied a third thing: I have to remove this piece of pipe, make the hole bigger, and put in a new fix using a press tool.
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Another view of the solder joints I would soon remove.
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