Originally Posted by
Tinthalas Tigris
This is sort of like tech support, but not.
I had to shut off a boiler, and the cold water inlet to a 3 story building with 28 multi-story apartments in it all tied to the one main/one boiler. I spent Thursday mapping the isolation process for the boiler, and for the cold water from the street. Alot of these places have redundancies so that you can further isolate systems in the boiler/filter/storage/circulation and then replace systems while residents can keep their water as though nothing is being interrupted from their normal service.
Unfortunately, i had to get change out some very outdated stop-valves beneath some bathroom faucets on galvanized MIP, and I really wanted to make sure I didn't mess it up, and things went smoothly.
So the cold water array that I'd been looking at was made mostly of 2inch directly from the shutoff at the street. It came out of the ground, hit a ball valve, went through a pressure regulator, hit another ball valve, and then worked its way up to the building, hit what looked like a Check-valve (and on a 2inch, this check-valve was a gigantic box - I wish I took a picture). and from the check valve it wandered through a circulatory bypass of sorts to another pressure regulator (I imagine as a redundancy in case it or the other one ever fails).
So, feeling confident, my boiler shutoff mapped and marked, I went to work. The ball valves were all stuck to high hell,a nd the last thing i wanted to do was pressure shock the system, so even though they eventually gave way and let me close them, I hit the pressure relief valve over the storage each time. Easy peeazy. Finally, i got the broiler shut down, and hit the kill-switch next to the whole system's breaker just in case I missed another system of the electrical - finally, I turned down the thermostat.
i was real happy and feeling confident. Whenever I get handed an old building like this, someone onboard staff always has something to say along the lines of, "Well, i hear its awful shutting off water to ____ building" or "just know that shutting off water here is really dangerous." They're words never said by anyone who is in the know of what they are actually talking about, but I'd heard from the interim guy before me AND the previous guy out on injury (who started doing this as retirement of sorts from professional plumbing) that this building that I was shutting water down on could be a challenge.
So I walk around to the opposite side of the building where the cold water shutoff is. Real simple ball valve, right beneath that 2 inch check valve I'd mentioned - it was the most logical place to shut it off, seeing as touching any of the gate valves could leave me with a gate valve that might completely freeze itself shut due to corrosion. So, I've got the pressure relief bibb open on the bottom of the junction to the redundant Pressure Regulator, and sending out plenty of high-pressure water when I slowly shut off the ball valve below the check valve.
For a second I start to wonder if I should even leave the PR open, hesitate for a moment - the last thing i want to do is blow the lines up above because of an excessive air buildup - and go ahead and close it, and cap it. Water starts flowing out of the check valve - its entire container, and out the side. Nowhere specific, just out the whole damn thing.
My first thought is, "FUCK. FUCK FUCK FUCK FUCK FUCK. WHY DID I HESITATE?" At this point, I honestly don't know what I'm going to do about that check valve, because there's absolutely no way I can bypass it where I shut off the water, and I still have the stop valves 3 flights above to deal with.
I figure, i might as well get my mission completed and worry about cleanup after.
So I'm upstairs, and i'm just waiting for the other shoe to drop. These galvanized pipes have got to crack, chip, break, who knows. Everyone always complains about them, and the building is pushing 40 years old.
Only they don't. These pipes were so well tended, where I normally have to use the amount of strength to bend a steel train track with my bare hands in such a confined space that a cheater bar doesn't even have room to cheat - I hardly move the pressure in my arm at the same amount of strength it takes to cut into butter thats been out of the fridge for an hour. One FIP stop valves off, Two stop valves, then 3, then 4. New ones on even quicker. Threading was so clean, I didn't need PTFE on there, but I figure I might as well be courteous to the guy who might have to do this same thing a decade after me.
That all easily done, I didn't even bother to put new supply lines on yet. I needed to cook my noodle on the water coming out of that check valve first.
So I get back down to the boiler, release pressure - even though there is none - from the storage tank. In reverse, I pop back on the circulatory pump's flow, the cold water to the filtration system, and then back through the boiler from the main line. Kill switch/breaker both re-engaged, and hit the PRV 3 more times.
Back down to the cold water line, I just stand there staring at the check valve. It is right in front of me where my hands are holding the Ball valve continuing to have water fall out of the cold water system above it, waiting for me to turn that ball valve on. My mind is calculating the possibilities all the while. I'm up on a pretty high and very steep hill. The street is about a 20 foot roll down the hill into a small brick wall and then concrete if I can dodge the wall. That will send water into the system and directly to that check valve at maybe 100 to 160 PSI - I guess I could hope that its actually going to be 60. In my mind I'm thinking, maybe the Pressure relief valve that was below this ball valve I used to shut off the line was no longer operating properly, and the check valve was taking brute punishment on its diaphragm before hitting the redundant PRV beyond it, and it finally "checked" its final cache of usefulness.
Without further much ado, I went to turn the ball valve. Water stopped coming out of the check valve. I stood there shocked. I should be soaked at the very least. Water should be spraying everywhere. I had the drain bibb open and water was spraying out of it - so I decided to go ahead and close that one in the mean-time.
i coudl not get my head around what I was looking at until I realized that the diaphragm of the check valve was designed to vent water when the system was closed - it sure as hell LOOKED bad, but in actuality, it was just a little corrosive in its designed nature.
End of the day, these things are always sort of a wonder to me. 3 years ago, you couldn't get me to even look at two valves and tell you which was which, and what went to wear. "Check" what?
I was brought up by a mother who said that if I didn't go to college I would be a garbage man. I was given the impression that people who worked with their hands were people lesser than me. I went my entire young life always curious about things like what I do now as second nature, and days like today are absolutely fucking amazing.
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THen there's that moment of humility that brings it all down, when at the end of the day, I'm in my work-shop, sitting at the desk, writing in my journal, condensing my notes about the property, revising, making and building timelines for projects that could happen, should happen, and need to happen, when I get a call about a toilet that is backed up.
Carrying my regular magical weapons up the apartment with the same sort of confidence in my smile, I am absolutely shocked when the tenant says, "Yeah, i told my husband about it this morning, and he said he'd take care of it, but he didn't, and now the toilet is backed up." -- followed by, "I don't know what happened exactly, I just know that our son put 3 rolls of toilet paper in there, and that someone used it and it hasn't been able to flush since.
Yeah -- Yeah -- I'll fix it... I always fix everything. Just.... Just next time... Next time, just fucking call when it happens. I'll fix it. I'll fix it like I always do. It's 5 o'clock and I have a family to feed and take care of, and my code of ethics requires me to finish this and get it working before I go home.
At least when this happen at 5 o'clock, it all turns into overtime.