I woke up this morning to a wet floor in the basement. It isn't finished so the wet cement is no big deal. I thought the water heater sprung a leak since that is where the floor was wet, but noticed the top of the furnace cabinet was wet and traced it to a pinhole in the 50 year old copper pipe running along the ceiling. The pinhole was in a 4" length between two T's so this was not going to be a simple fix.
4 hours later and two trips to the hardware store i now have about 35 feet of old copper along with various 90's, T's and a couple valves replaced with CPVC.
The shark bite style fittings made it go much faster for me since i didn't have to fully drain everything to sweat fittings to the copper that still remains. Those things are high $$$ ($18 for a 3/4" valve) so I just used them to transition to the CPVC and went all plastic from there.
i would have had it done in 3 hrs and 1 trip, but one of the shark bite unions wouldn't seal around one run of the CPVC so it took a second trip to get another union. With all the extra fittings i bought on the first trip 'just in case' of course i didn't have the needed extra union! Then i couldn't get the bad union off the copper side so i ended up cutting the line back a little further so i could install the second union. even after that section was out i still couldn't get that union off that section of pipe to see if i could tell why it dripped.
then i noticed the old copper coming off the hot water heater looks bad in some places too (greenish residue around some fittings). There is even a gray plastic coupling above the furnace duct that i hadn't ever noticed before. I'll probably pick up some more fittings & pipe and swap that section this coming weekend. better to schedule it than have it start leaking at an inconvenient time, like midnight when everything is closed.
i am just hoping i didn't cause any other damage to the remaining copper & fittings by jostling the pipe around doing the work. i left all my tools down there because i know as soon as i take them back out to the workshop a drip will show up!