Like I didn’t have enough things on my plate. This morning I spotted a water stain
on the living room wall where it meets the ceiling. It is directly under the upstairs bathroom, no surprize there. At first I was thinking that Trouble must have pee’d on the floor up there, but that would have taken a case worth of beer to create that much liquid to soak through the floor and into the ceiling/wall and she isn’t a drinker.
The floor was dry around the toilet, I even pulled up the carpet – all dry. The wall was dry under the sink, no visible leaks. I figure it is probably the hot water supply line angle stop since it has always had a build up of rust and some old rust stain runs on the wall. I’ve never noticed any moisture so I was never really concerned about fixing it even though I knew it should be replaced. But in my book with plumbing anyway it’s let sleeping dogs lie.
I get ready to start tearing out the wall and discover I don’t have a drywall demo saw, off to Home Depot. The wall is very tough sawing, turns out it is two layers of sheetrock so that explains the toughness. I cut out a small section near the hot water line. I can see that there is massive corrosion. How can that be? I have copper pipes. I figure it just must be built up from the valve rusting as the water slowly ran along the outside of the pipe over time, but I need a better look. I remove more wall so I can see all sides and get my hands inside. 
Well now it makes sense, I’m enjoying the fruits of some idiot plumber from the past. Most likely Denny, the previous owner. Someone used galvinized pipe for the stub out. This is not looking good. I’m very sure that the pipe will disintegrate as soon as I put a wrench to it to unscrew it from the copper elbow in the wall. I turn off the water to the house and drain some water out of the hot lines. I put my wrench on the valve body and give a twist. Yep the pipe shears off about half way down it’s length in a shreaded crumbling mess.
Well I think I could be screwed now.
I can’t turn the water back on until the pipe is repaired. I now need to remove the soldered copper elbow from inside the wall and then install a new copper elbow and new copper stub out. Soldering copper pipes is not my strong suit. In fact at work I really try to avoid it at all costs on supply lines I’d rather have the pros do it. I’ve had many a leaky solder joints. I tried and failed running new copper into my darkroom 12 years ago and have been gun shy ever since. In fact while I had success before that time, since I’ve only dared to try it once about six months ago and it worked out. However, this one is inside the wall which is behind the vanity cabinet, just to make it more of a challenge. I will give it a try, after all at this point I have nothing to loose, other than setting the house on fire (not afraid of that). Okay the elbow is nailed to a support board, so I need to detach it first. Well the nails are bent over behind the board just to make it more difficult. They are just not budging. I decide to cut off the pipe below the fitting and will just run out the line lower on the wall. Damn can’t use a tubing cutter because of a strategically placed stud. Okay back to the nails. I work a screwdriver behind the fitting and work out some slack. Finally I can get my pry bar behind the fitting and pry away but my screwdriver is sacrificed in the process to the plumbing gods as it plummets out of sight into the abyss behind the wall. I get one nail all the way out. I work on the other side but just don’t have room to pry after a certain point because of that stud. The head is far enough out now to get my vise-grips on it so I work the nail back and forth until it breaks off.
Off to Home Depot for solder, flux, pipe, angle stop, flame guard, pipe cleaner, elbow fitting. I need to desolder the the old fitting off, quickly and easily it comes off,
hey things are starting to look good. I then solder the stub out pipe to the elbow
before crawling back under the sink. I get Lauren to hold a flash light for me. Then I solder the elbow onto the supply line. Done – looks good, I have a good feeling about this. I attach the new valve and get Lauren to stand watch for gushers as I go turn the water back on. Success just a small seep from the angle stop which is cured with another twist of my wrench. All of my solder joints are dry.
I declare the pipe fixed and lug my tools away to the garage. Just the wall to repair now, which will wait for another day.