1. Attachments are working again! Check out this thread for more details and to report any other bugs.

Weird plumbing problem

Discussion in 'Fred's House of Pancakes' started by qbee42, Apr 10, 2009.

  1. qbee42

    qbee42 My other car is a boat

    Joined:
    Mar 2, 2006
    18,058
    3,074
    7
    Location:
    Northern Michigan
    Vehicle:
    2006 Prius
    I just had a very odd household plumbing problem. I found a pinhole leak in a 3/4 copper cold water line. It wasn't at a seam, it's not in a wall, and it wasn't damaged. The leak was in a straight vertical run of 37 year old copper supply pipe.

    I went downstairs to turn on a gas valve for the outdoor grill (my concession that spring may be here), and heard a hissing sound coming from the downstairs utility room. I turned on the light and there was water running down the water heater. I thought "Oh crap, there goes the water heater", but a closer inspection revealed the the water was spraying on the water heater, not coming from it.

    What an odd thing to spring a leak in a spot like that.

    Tom
     
  2. jayman

    jayman Senior Member

    Joined:
    Oct 21, 2004
    13,439
    641
    0
    Location:
    Winnipeg Manitoba
    Vehicle:
    2004 Prius
    Tom

    Actually, pinhole leaks in copper water piping is well documented. At least I thought it was. Here are some reports. It appears Maryland has a high incidence

    Pinhole Leaks in Copper Pipes

    http://www.wssc.dst.md.us/copperpipe/letters/investigation_fs.pdf

    It can happen anywhere

    Copper Pinhole Leaks

    Copper Pipe

    Leaky Pipes

    Long story short, and I know this is the LAST thing you want to hear, is this: you have to replace the entire length of pipe. You *must* assume that other pinholes are ready to breakthrough.

    I know your home has hard water, from wells. However, chlorination was recently done, correct? It's thought that chlorination combined with hard water, and certain other water chemistries, leads to pinholing

    It's pretty important you take care of this at once. Any piping behind gyproc is also probably undergoing pinholing

    Sorry about the bad news, but I tell it like it is ...

    jay
     
  3. jayman

    jayman Senior Member

    Joined:
    Oct 21, 2004
    13,439
    641
    0
    Location:
    Winnipeg Manitoba
    Vehicle:
    2004 Prius
    Really, I'm not bulls***ing you on this.

    Also, Evan, if you're reading this, your lake home may have a similar process going on too. Any time you have a length of rarely used copper pipe that gushes black/brown water for the first minute or two, it's highly likely the water chemistry is causing severe corrosion inside the piping

    The best remedy to date is to replace the copper piping with pex
     
  4. FL_Prius_Driver

    FL_Prius_Driver Senior Member

    Joined:
    Jun 17, 2007
    4,319
    1,527
    0
    Location:
    Tampa Bay
    Vehicle:
    2010 Prius
    Model:
    I
    While looking at one of the links (Copper Pinhole Leaks) I was relieved to find that a study was done making sure "Harmonic divergence (the alignment of the planets)" was not the problem.

    Unless, of course, qbee42 is not of this earth.
     
  5. jayman

    jayman Senior Member

    Joined:
    Oct 21, 2004
    13,439
    641
    0
    Location:
    Winnipeg Manitoba
    Vehicle:
    2004 Prius
    The study had to explicitly exclude "harmonic divergence" as a nutcase group was going around claiming it was The End Of The World.

    Really

    Just so you know how your taxpayer dollars are being spent: calming the fears of nutcase loons.

    Remember, even nutcase loons have rights - oodles of rights matter of fact - and are allowed to vote

    They are also allowed to breed, and frequently do so

    Back to copper pinholing: very, very bad news

    Tom is being unusually quiet. I'm picturing the 3/4 pipe finally springing thousands of little leaks, like a sprinkler hose (Except the sprinkler hose is SUPPOSED to do that), and Tom finally snapping and about ready to swing a large axe at the plumbing

    I'm actually very proficient at plumbing. I just really, really hate doing it. Which is why I always do it right the first time
     
  6. hyo silver

    hyo silver Awaaaaay

    Joined:
    Mar 2, 2005
    15,232
    1,563
    0
    Location:
    off into the sunset
    Vehicle:
    2004 Prius
    Model:
    N/A
    You don't barbecue year round? I've got a bright headlamp that works very well for dark winter nights. That fur hat of yours would be perfect for keeping warm while flipping burgers. Of course, you might need to build a little snow fence around the porch, but I digress.

    Yes, pinholes in copper pipe are no fun at all. I've had the same thing in my 70 year old house, and it has nothing to do with any innate ability to screw things up, as Jayman alleges Tom suffers from. You can plug the current leak with a bit of solder...after you drain the pipe, of course, or you may run out of gas in your blowtorch waiting for it to heat up...buuut, more holes and leaks are inevitable. Something to do with electric currents in dissimilar metals, I was told. Once you get the hang of sweating copper fittings, it's kinda fun, but yeah, the plastic stuff is way easier, and you don't need nearly so many elbows. Or hands. :)
     
  7. jayman

    jayman Senior Member

    Joined:
    Oct 21, 2004
    13,439
    641
    0
    Location:
    Winnipeg Manitoba
    Vehicle:
    2004 Prius
    Can actually be proven ....

    I'm pretty sure that theory has been mostly rejected. The primary culprit appears to be water pH (Either too high or too low), chlorination (Chlorammine is MUCH worse than chlorine dioxide), and some complex water chemistry eg a good science fair project

    Personally, I wouldn't waste my time on a quick repair, eg the blob of solder. If there is a pinhole, there are many more just waiting to spring a leak

    I no longer deal with copper pipe, as it can be a royal PITA to work with. I'm pretty good with pex, actually prefer it now. No more dinking around with el's, 90's, 45's, etc
     
  8. qbee42

    qbee42 My other car is a boat

    Joined:
    Mar 2, 2006
    18,058
    3,074
    7
    Location:
    Northern Michigan
    Vehicle:
    2006 Prius
    Thanks for the information. I hadn't realized that copper was having trouble like this. Historically it was considered a very good plumbing material, but as Jayman recalls, we have very hard water, which only recently has been chlorinated.

    As for patching the leak, that's no problem. In my earlier days I worked as a plumber and electrician, so I'm pretty good at sweating copper. I haven't worked with pex, but about a month ago I did some research and decided it would by my selection for any future work.

    The only real problem with copper and soldering is getting out all of the water. It's almost always a pita to get it dry with old plumbing. The line with the pinhole is the main cold line after the water meter, so the entire building is behind it. It took a lot of draining.

    The good news is that it is in a concrete utility room with a good drain. From the sound of those reports Jayman posted, it looks like I will get to do a little more work.

    Tom
     
  9. dogfriend

    dogfriend Human - Animal Hybrid

    Joined:
    Feb 26, 2007
    7,512
    1,187
    0
    Location:
    Carmichael, CA
    Vehicle:
    2007 Prius


    Isn't corrosion a cool subject? :madgrin:

    Oh, by the way, your car is doomed as well. :madgrin:
     
  10. qbee42

    qbee42 My other car is a boat

    Joined:
    Mar 2, 2006
    18,058
    3,074
    7
    Location:
    Northern Michigan
    Vehicle:
    2006 Prius
    I do barbecue in cold weather, but when the grill disappears under the snow I give up. Right now there is snow on three sides of the grill, but it is back enough that I can use it. A few weeks ago there were several feet of snow over the top of the grill.

    Tom
     
  11. qbee42

    qbee42 My other car is a boat

    Joined:
    Mar 2, 2006
    18,058
    3,074
    7
    Location:
    Northern Michigan
    Vehicle:
    2006 Prius
    Once again, thanks for the heads up on pinhole corrosion in copper pipe. I had no idea that this had become an issue. If you had asked me, I would have speculated that hard water might cause liming of the inside of the pipe, which is pretty much the opposite of what is happening.

    Jayman, do you have any tips or suggestions about using PEX? As I mentioned before, I started looking at it a few months ago, but I have never installed any. The process looks straight forward, but I assume there are tricks. Obviously there is a structural issue, since the PEX is not ridged. Valves and fittings must be supported somehow, otherwise it's going to be a bowl of spaghetti. Do you like any particular brand better than others?

    Tom
     
  12. hyo silver

    hyo silver Awaaaaay

    Joined:
    Mar 2, 2005
    15,232
    1,563
    0
    Location:
    off into the sunset
    Vehicle:
    2004 Prius
    Model:
    N/A
    I often use a small portable 'camping' barbecue, which sits on a few bricks and a sheet of wood on top of the snow. When it has to - most of the winter here is just wet. The barbie lives inside most of the time so the raccoons don't make off with it. How they get it started, I have no idea.
     
  13. jayman

    jayman Senior Member

    Joined:
    Oct 21, 2004
    13,439
    641
    0
    Location:
    Winnipeg Manitoba
    Vehicle:
    2004 Prius
    I can see why your wife kept you all these years. To quote Red Green:

    "If the women don't find you handsome, they should at least find you handy"
     
  14. jayman

    jayman Senior Member

    Joined:
    Oct 21, 2004
    13,439
    641
    0
    Location:
    Winnipeg Manitoba
    Vehicle:
    2004 Prius
    Absolutely! Corrosion, chemistry in general, I find *extremely* fascinating

    Especially when it happens to anyones house but mine
     
  15. koa

    koa Active Member

    Joined:
    Aug 9, 2005
    980
    45
    0
    Location:
    Hawaii
    Vehicle:
    2006 Prius
    Home Depot carries Sharkbite fittings which make this kind of repair easy. No solder, cut out section, just slip on new section. I've used them and they are rated for in wall.

    Welcome To Cash Acme



    I am already aware of the misconceptions concerning shark attacks on humans.;)
     
  16. jayman

    jayman Senior Member

    Joined:
    Oct 21, 2004
    13,439
    641
    0
    Location:
    Winnipeg Manitoba
    Vehicle:
    2004 Prius
    I prefer the IPex Aqua brand, because they have good support. They also have that new bendable product that is a sandwich of pex-aluminum-pex. The primary advantage of this product is you don't need compression rings. You just slide the tubing onto the special fitting (THey also have transition fitting to go from copper to aquaPex), then tighten down the compression nut

    The pex tubing must be cut precisely. That is, a sloppy cut that is not precisely 90 degrees will almost guarantee a leak at the fitting

    There are a variety of tools that are used to pull the ring/pex onto the fitting, and to crimp the ring. I had to try out several different tools to find one that worked best for me. If I recall, I paid around $220 for the tool, which came with a kit including 1/2 and 3/4 adapters

    If you live near a big box, they probably have them to rent. Ask to see the pex tool, they usually will demo the tool on a short chunk of pex

    Supporting the pex is a lot more critical than with rigid copper. There are clamps that look sort of like the clamps you use to support electrical romex. If you wish I can take some photos and email them to you
     
  17. jayman

    jayman Senior Member

    Joined:
    Oct 21, 2004
    13,439
    641
    0
    Location:
    Winnipeg Manitoba
    Vehicle:
    2004 Prius
    Have you ever seen the front paws of a raccoon? If they trimmed their claws, they could easily play the piano, type at a computer keyboard, hotwire a car, and fire up a bbq
     
  18. dogfriend

    dogfriend Human - Animal Hybrid

    Joined:
    Feb 26, 2007
    7,512
    1,187
    0
    Location:
    Carmichael, CA
    Vehicle:
    2007 Prius
    I took a graduate level course in Corrosion many years ago. I remember one of the conclusions: Your car (or really anything made of steel) is thermodynamically predetermined to become a pile of Iron Oxide. You can slow it down (change the kinetics) but you can't change the fact that Iron Oxide has a lower energy level than processed steel. It makes sense to my feeble mind: You can take iron ore out of the ground, process it into steel, but its natural state (lowest energy state) was iron ore, and it will eventually become iron ore again.
     
  19. hyo silver

    hyo silver Awaaaaay

    Joined:
    Mar 2, 2005
    15,232
    1,563
    0
    Location:
    off into the sunset
    Vehicle:
    2004 Prius
    Model:
    N/A
    Sharkbite fittings are a temporary fix, likely to give you a false sense of security. Once a copper pipe has pinholes, it's rotten from within. Sadly, good plumbing only lasts so long, as Tom's wife may well attest. :p
     
  20. hyo silver

    hyo silver Awaaaaay

    Joined:
    Mar 2, 2005
    15,232
    1,563
    0
    Location:
    off into the sunset
    Vehicle:
    2004 Prius
    Model:
    N/A
    Oh, that's too many big words for so early in the day. Just say 'rust never sleeps.' :)