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Copper to Brass Pipe

BlueDevil | Posted in General Discussion on December 30, 2007 10:57am

I am working in an old house and have a corroded brass elbow.  I have 1/2″ copper on one end and what appears to be older brass/copper pipe on the other. The problem is that the brass pipe’s O.D. is a heavy 5/8″ and will not fit a 1/2″ copper coupling.  The brass stub is in a tight spot and removing it is not practical as it feeds a 2nd floor shower and I am in the basement.  How can I join the two.  An HD genius suggested Watts 5/8″ heater hose and airplane clamps until a proper fix can be complete (3-6 months).  Could that actually work?  Obviously the 170+/- temp rating is OK as the water heater is at about 130 degrees.  What about pressure.  I am guessing house pressure at less than 50 psi.   Thanks in advance. 

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Replies

  1. McMark | Dec 31, 2007 01:05am | #1

    Sounds like the brass pipe is 3/8 NPT.  Get a 3/8 (f) NPT by 1/2 copper water tube adaptor, and you're off to the races

    1. BlueDevil | Dec 31, 2007 03:08am | #4

      Thanks McMark.  As you will soon tell, plumbing outside of standard 1/2 sweating and pvc work is not my first profession.  Will the fitting you mentioned allow a sweat/sweat joint between the two or am I building something more elaborate.  Currently, the ends of both pipes are stubs (no threads).   I don't want to look like too much of a newbie at my supply house tomorrow.  Thanks again.

      1. McMark | Dec 31, 2007 04:01pm | #7

        Oh, I didn't realize that the threads on the nipple end were shot.  You have a slightly complicated deal.

        Does it look like the pipe broke above the elbow?  Can you see the next screwed fitting downstream (towards the fixture) from your location?

        You could:

        1) Unscrew the pipe at the next fitting, and thread on a new nipple.

        2) Clean the outside of the brass pipe well, and use a IPS (Iron Pipe Size) X IPS compression coupler.  They do make these.  Then you can adapt to copper water tube.  Good luck

        1. BlueDevil | Dec 31, 2007 04:29pm | #8

          Thanks. I think option 2 is the way to go.  I can't see the next couple down stream.  Well, off to find an IPS compression fitting.  Thanks again and to everyone else.

          1. DaveRicheson | Dec 31, 2007 06:35pm | #9

            Go to a the local plumbing /HVAC supply house and  pick up a 5/8" to 1/2" tubing to pipe adapter. It will be a seat/sweat fitting.

            Tubing is measure  O.D.. pipe is measure I.D.

            HVAC guys do this all the time. Fix it right now and you won't have to remember to fix it in 6 months.

             

            Dave

          2. BlueDevil | Dec 31, 2007 10:00pm | #10

            Thanks to all.  I am fixed!  I got a 3/8" reamed adapted with a 1/2" sweat end at the local supply house.  A couple of sweat joints and I am back in business!

  2. User avater
    Sphere | Dec 31, 2007 01:18am | #2

    I had a pipe burst in the middle of a freezing night, minus 4 or therebouts. It was a hot water feed copper pipe. Steam everywhere under a rented trailer.

    I used a hunk of auto heater hose ( red IIRC) and hose clamps as an emergency fix. I never did get round to fixing it permanent like before I moved out..I bet it's still holding.

    Go for it.

    Spheramid Enterprises Architectural Woodworks

    "Success is not spontaneous combustion, you have to set yourself on Fire"

  3. USAnigel | Dec 31, 2007 01:32am | #3

    If your only looking at 6 months then the "rubber" pipe will do the job. You can wrap some thin metal (bean can) around the rubber pipe and under the clamps to prevent cutting into the rubber pipe by the hose clamps.

  4. NatW | Dec 31, 2007 05:19am | #5

    Standard rubber garden hoses have some minor lead content from the manufacturing process forms or something. Garden hoses for RVs are marked as OK for potable use and of a different type of material.

    If your application is short term and not for drinking water (most hot water is not) this may not make a difference, but thought I'd throw it out there for consideration.

  5. WayneL5 | Dec 31, 2007 06:48am | #6

    Yes, the heater hose will work fine for a few years.  The major risk is that if you have much water hammer the hose can slide off the slick pipe over time even if the clamps are tight.  I would not consider it a permanent repair.

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