steel pipe to pvc

Discussion in 'Home Repair' started by Jeff Thies, Sep 21, 2010.

  1. Jeff Thies

    Jeff Thies Guest

    I have an old steel water supply pipe and would like to convert to
    PVC (and then to CPVC). I had cut the steel line and used a PVC pipe
    "repair" (I don't remember the proper name for that). That sprung a leak
    on the steel side so I've replaced it with one for steel pipe, this
    leaks on the PVC side.

    What is the solution here?

    Jeff
    Jeff Thies, Sep 21, 2010
    #1
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  2. Jeff Thies

    Jeff Thies Guest

    On 9/20/2010 11:41 PM, Jeff Thies wrote:
    > I have an old steel water supply pipe and would like to convert to PVC
    > (and then to CPVC). I had cut the steel line and used a PVC pipe
    > "repair" (I don't remember the proper name for that).



    Mission Coupling.

    That sprung a leak
    > on the steel side so I've replaced it with one for steel pipe, this
    > leaks on the PVC side.
    >
    > What is the solution here?


    I've used no "dope" of any kind. I would think it wouldn't need it.
    This is 3/4" steel line.

    Jeff

    >
    > Jeff
    >
    >
    Jeff Thies, Sep 21, 2010
    #2
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  3. Jeff Thies

    Dean Hoffman Guest

    Jeff Thies wrote:
    > On 9/20/2010 11:41 PM, Jeff Thies wrote:
    >> I have an old steel water supply pipe and would like to convert to PVC
    >> (and then to CPVC). I had cut the steel line and used a PVC pipe
    >> "repair" (I don't remember the proper name for that).

    >
    >
    > Mission Coupling.
    >
    > That sprung a leak
    >> on the steel side so I've replaced it with one for steel pipe, this
    >> leaks on the PVC side.
    >>
    >> What is the solution here?

    >
    > I've used no "dope" of any kind. I would think it wouldn't need it.
    > This is 3/4" steel line.
    >
    > Jeff
    >
    >>
    >> Jeff


    Have you thought about using a dresser coupler? It's a sleeve
    with a compression fitting one each end. One tightens a nut on each end
    to make the seal tight. Example here:
    http://tinyurl.com/27t8dzh
    Dean Hoffman, Sep 21, 2010
    #3
  4. Jeff Thies

    Guest

    On Mon, 20 Sep 2010 23:41:48 -0400, Jeff Thies <>
    wrote:

    > I have an old steel water supply pipe and would like to convert to
    >PVC (and then to CPVC). I had cut the steel line and used a PVC pipe
    >"repair" (I don't remember the proper name for that). That sprung a leak
    >on the steel side so I've replaced it with one for steel pipe, this
    >leaks on the PVC side.
    >
    > What is the solution here?
    >
    > Jeff
    >


    I generally help people DIY, but in your case, CALL A PLUMBER.

    OR, replace it with steel pipe like you originally had, but I dont
    think your qualified to do this.
    , Sep 21, 2010
    #4
  5. Jeff Thies

    HerHusband Guest

    Hi Jeff,

    > I have an old steel water supply pipe and would like
    > to convert to PVC (and then to CPVC). I had cut the
    > steel line and used a PVC pipe "repair" (I don't
    > remember the proper name for that). That sprung a leak
    > on the steel side so I've replaced it with one for
    > steel pipe, this leaks on the PVC side.
    > What is the solution here?


    Use a couple of pipe wrenches where necessary to remove the pipe back to
    the nearest fitting (assuming you already cut the threads off the steel
    pipe). In my experience, old galvanized steel pipe is usually rusted and
    filled with corrosion (often down to just a pin hole), so it's very
    possible the pipe or fitting will crack as you dissassemble it and you'll
    have to keep removing pipe or fittings until you get back to something
    solid.

    Once you have a clean threaded fitting (or a threaded pipe end), pick up
    the appropriate "transition fitting" from a plumbing supply or local home
    center (Lowes or Home Depot). Basically, these have a brass fitting on one
    side you can thread to your steel pipe, and a CPVC fitting on the other.
    Then you can repair the plumbing with CPVC pipe as needed. Be sure to add a
    few wraps of teflon tape on the threaded fittings before assembling.

    By the way, according to code, you can only use CPVC for work inside the
    building. Regular PVC is only allowed for irrigation or outdoor water
    lines.

    Depending on the age of your plumbing, you may fix one leak, only to have
    another one pop up further down the line. This happened at my in-laws
    house. After a couple of repairs, it was easier to just replace everything
    with CPVC pipe.

    Anthony
    HerHusband, Sep 21, 2010
    #5
  6. Jeff Thies

    An72

    Joined:
    Sep 20, 2010
    Messages:
    17
    Well I suggest to call a plumber right away, to make sure that it will be fix it.
    An72, Sep 21, 2010
    #6
  7. Jeff Thies

    Jeff Thies Guest

    On 9/21/2010 10:38 AM, HerHusband wrote:
    > Hi Jeff,
    >
    >> I have an old steel water supply pipe and would like
    >> to convert to PVC (and then to CPVC). I had cut the
    >> steel line and used a PVC pipe "repair" (I don't
    >> remember the proper name for that). That sprung a leak
    >> on the steel side so I've replaced it with one for
    >> steel pipe, this leaks on the PVC side.
    >> What is the solution here?

    >
    > Use a couple of pipe wrenches where necessary to remove the pipe back to
    > the nearest fitting (assuming you already cut the threads off the steel
    > pipe). In my experience, old galvanized steel pipe is usually rusted and
    > filled with corrosion (often down to just a pin hole), so it's very
    > possible the pipe or fitting will crack as you dissassemble it and you'll
    > have to keep removing pipe or fittings until you get back to something
    > solid.



    That is my experience also and this is 80+ year old pipe. I am close
    to the incoming connection which is buried.

    >
    > Once you have a clean threaded fitting (or a threaded pipe end), pick up
    > the appropriate "transition fitting" from a plumbing supply or local home
    > center (Lowes or Home Depot). Basically, these have a brass fitting on one
    > side you can thread to your steel pipe, and a CPVC fitting on the other.
    > Then you can repair the plumbing with CPVC pipe as needed. Be sure to add a
    > few wraps of teflon tape on the threaded fittings before assembling.


    I've got a dresser (that is the real word I was looking for) coupling
    going to a piece of threaded steel pipe and then I have the CPVC
    transition since I have threads now. Some day I'd like to get rid of the
    dresser coupling but I think I will get a "good" plumber to do that.

    At the time, since the stores were closed, I was looking for a temp
    solution to stopping the leak.
    >


    > By the way, according to code, you can only use CPVC for work inside the
    > building. Regular PVC is only allowed for irrigation or outdoor water
    > lines.


    Good. That is what I am doing.
    >
    > Depending on the age of your plumbing, you may fix one leak, only to have
    > another one pop up further down the line. This happened at my in-laws
    > house. After a couple of repairs, it was easier to just replace everything
    > with CPVC pipe.


    It's all going to CPVC (except the parts that had been redone in
    copper). Kitchen and bath are going to new fixtures. I may have had the
    original sink, this is the time to get the house out of the 20's.

    It's a zoo in the basement.
    >


    Thanks,
    Jeff
    > Anthony
    Jeff Thies, Sep 22, 2010
    #7
  8. Jeff Thies

    Guest

    On Wed, 22 Sep 2010 07:44:19 -0400, Jeff Thies <>
    wrote:

    > It's a zoo in the basement.
    >>


    Then you have a good source of income :)
    , Sep 22, 2010
    #8
  9. Jeff Thies

    HerHusband Guest

    Jeff,

    >> In my experience, old galvanized steel pipe is usually rusted and
    >> filled with corrosion (often down to just a pin hole), so it's very
    >> possible the pipe or fitting will crack as you dissassemble it and
    >> you'll have to keep removing pipe or fittings until you get
    >> back to something solid.


    > That is my experience also and this is 80+ year old pipe. I am
    > close to the incoming connection which is buried.


    Yep, I can relate... :) My mother in-law mentioned her kitchen faucet
    was dripping. I though no big deal, I'd just change the seal or install a
    new cartridge. Turns out the faucet was leaking around the spout which
    naturally crumbled and broke off when I tried to unscrew it. So, it was
    time to replace the faucet.

    Unfortunately, it was an old wall mounted faucet. After a week of
    hunting to find an affordable replacement, the pipes in the wall cracked
    when I tried to remove the faucet connections.

    So, I bought some special inside pipe wrenches to try and remove the
    broken pipe stubs from the elbows in the wall. Of course, the metal was
    so corroded it just crumbled and the elbows fell apart.

    I thought, OK, I'll just replace the pipes running down the wall to the
    basement. I literally just got the pipe wrench on the pipe and fitting in
    the basement and it cracked at the fitting. I didn't even have to apply
    pressure. :)

    So, I decide to remove the bottom elbow where the pipe cracked off. I put
    one wrench on the fitting, one on the pipe, and slowed tried to unthread
    them. As you might expect, the next 8 foot length of pipe split
    LENGTHWISE more than half way down the pipe.

    After all this, it was obvious a repair was out of the question. There
    was only a few feet of original pipe left, so I just replaced all the
    plumbing. Thankfully, I was able to remove the last segment of
    galvanized pipe at the shut off valve where the incoming supply comes
    through the basement wall.

    I installed a new kitchen sink so I could use a standard deck mount
    kitchen faucet, then replumbed the entire house using CPVC.

    As a bonus, we discovered why the bathtub had no hot water. The
    galvanized pipe had completely clogged up with rust and corrosion to the
    point that only a few drips of water could flow through.

    > It's a zoo in the basement.


    Yep, sounds like my in-laws place. Old rusty galvanized pipes hanging
    down from the floor joists, and big cast iron drain pipes sticking down
    that we were always banging our heads on. (Not the mention the scary
    looking, cob web covered, knob and tub wiring with missing insulation).

    It has taken us a few years, but we replaced the supply lines with CPVC,
    and cut out the cast iron drains and replumbed with PVC when we remodeled
    the bathroom. I also installed a new breaker panel and underground
    service when I rewired the entire house a couple of years ago.

    What started out as a few "maintenance" items to help out my in-laws, has
    turned into an ongoing project that has already lasted several years. Now
    my mother-in-law keeps asking when we're going to remodel her kitchen.
    Sheesh... :)

    Anthony
    HerHusband, Sep 22, 2010
    #9
  10. Jeff Thies

    Harry K Guest

    On Sep 22, 4:44 am, Jeff Thies <> wrote:
    > On 9/21/2010 10:38 AM, HerHusband wrote:
    >
    >
    >
    >
    >
    > > Hi Jeff,

    >
    > >> I have an old steel water supply pipe and would like
    > >> to convert to PVC (and then to CPVC). I had cut the
    > >> steel line and used a PVC pipe "repair" (I don't
    > >> remember the proper name for that). That sprung a leak
    > >> on the steel side so I've replaced it with one for
    > >> steel pipe, this leaks on the PVC side.
    > >> What is the solution here?

    >
    > > Use a couple of pipe wrenches where necessary to remove the pipe back to
    > > the nearest fitting (assuming you already cut the threads off the steel
    > > pipe). In my experience, old galvanized steel pipe is usually rusted and
    > > filled with corrosion (often down to just a pin hole), so it's very
    > > possible the pipe or fitting will crack as you dissassemble it and you'll
    > > have to keep removing pipe or fittings until you get back to something
    > > solid.

    >
    >    That is my experience also and this is 80+ year old pipe. I am close
    > to the incoming connection which is buried.
    >
    >
    >
    > > Once you have a clean threaded fitting (or a threaded pipe end), pick up
    > > the appropriate "transition fitting" from a plumbing supply or local home
    > > center (Lowes or Home Depot). Basically, these have a brass fitting on one
    > > side you can thread to your steel pipe, and a CPVC fitting on the other..
    > > Then you can repair the plumbing with CPVC pipe as needed. Be sure to add a
    > > few wraps of teflon tape on the threaded fittings before assembling.

    >
    >    I've got a dresser (that is the real word I was looking for) coupling
    > going to a piece of threaded steel pipe and then I have the CPVC
    > transition since I have threads now. Some day I'd like to get rid of the
    > dresser coupling but I think I will get a "good" plumber to do that.
    >
    >    At the time, since the stores were closed, I was looking for a temp
    > solution to stopping the leak.
    >
    >
    >
    > > By the way, according to code, you can only use CPVC for work inside the
    > > building. Regular PVC is only allowed for irrigation or outdoor water
    > > lines.

    >
    >    Good. That is what I am doing.
    >
    >
    >
    > > Depending on the age of your plumbing, you may fix one leak, only to have
    > > another one pop up further down the line. This happened at my in-laws
    > > house. After a couple of repairs, it was easier to just replace everything
    > > with CPVC pipe.

    >
    >    It's all going to CPVC (except the parts that had been redone in
    > copper). Kitchen and bath are going to new fixtures. I may have had the
    > original sink, this is the time to get the house out of the 20's.
    >
    >    It's a zoo in the basement.
    >
    >
    >
    >   Thanks,
    > Jeff
    >
    >
    >
    > > Anthony- Hide quoted text -

    >
    > - Show quoted text -- Hide quoted text -
    >
    > - Show quoted text -


    Okay. The coupling is really a "compression fitting" or by name
    "Dressler Coupling".

    Solutions to your problem:

    1. Beg, buy, rent or steal a pipe threader and thread the cut end.
    Pipe that old may not take the stress of threading though. Where I am
    galvanised pipe will be nothing but a thin shell when that old (ask
    how I know...well, okay, I had to replace every underground pipe in my
    place due to pipe corrosion which included over a 1/4 mile run to the
    well) This soil eats pipe.

    2. Buy a 6" or so galvanised nipple and coupling, insert in Dressler
    Coupling and then make the transition using a male PVC coupling.

    Warning! Never, but never use a female threaded PVC fitting going
    onto a galvanised pipe. Tightening them tends to cause them to split
    on the casting seam - again ask how I know.

    Harry K
    Harry K, Sep 22, 2010
    #10
  11. I'd think to disassemble back to the next set of threads. And then use
    threaded CPVC from that point.

    --
    Christopher A. Young
    Learn more about Jesus
    www.lds.org
    ..


    "Jeff Thies" <> wrote in message
    news:i799i0$dq3$...
    I have an old steel water supply pipe and would like to convert to
    PVC (and then to CPVC). I had cut the steel line and used a PVC pipe
    "repair" (I don't remember the proper name for that). That sprung a
    leak
    on the steel side so I've replaced it with one for steel pipe, this
    leaks on the PVC side.

    What is the solution here?

    Jeff
    Stormin Mormon, Sep 23, 2010
    #11
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