I don't trust sharkbites. My prediction is that in a few years, the shark teeth will corrode off, and the valves will leak, come off, etc.
Sometimes you have to sweat in a short length of tubing, and a slip coupler. Or, a water copper union.
Other times you can unsweat the old valve, and put the new one right there.
Christopher A. Young Learn more about Jesus
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Whether it be the sharkbite system. which looks intriguing, or a standard solder joint, one aspect I haven't found yet is how to properly cut out and remove the old valve so the new pieces will slip in properly.
Namely how do you best compensate for the inch where the pieces will mate without unnecessary tugging on the existing remaining copper pipe? Or am I being too cautious?
One thing I did verify today is I can easily shut off the household water supply at the meter. Plus I have a spigot near the basement steps lower to the ground that will aid in proper draining of the pipe.