Galvanized plug in copper pipe?

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by ecoops, Oct 24, 2006.

  1. ecoops

    ecoops New Member

    Joined:
    Oct 3, 2006
    I have copper pipe in my walls where I removed the bathtub and am building a Kerdi shower stall. I want to plug the spigot from the old bathtub with a plug as it will no longer be used.

    I went to my local Home Depot but they didnt have any threaded copper plugs, so I purchased a galvanized plug. I was about to install the galvanized plug but my brother in-law (who is no plumber) says that the contact between glavanized and copper will cause the pipe to corrode and fail.

    Is this true or can I just go ahead and use the plug?

    Thanks in advance.
     
  2. plumber1

    plumber1 Plumber

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    Aug 7, 2005
    Location:
    Florida
    Get a brass plug. They are not hard to find.
     
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  4. Master Plumber Mark

    Master Plumber Mark Master Plumber

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    Sensitivity trainer...to be caring and loving to a
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    indianapolis indiana - land of the free, home of
    galvanized plugs

    I beg to difer.......
    either one will work ok...

    the galvanized plug will last about 35 years

    the brass will last about 55.........


    so how long you gonna be in the house???
     
  5. humorazz

    humorazz New Member

    Joined:
    Oct 27, 2006
    electrolyisis

    Anyways doesnt matter if u are isolating that line, cut the half inch pipe ,that is copper u have explained and sweat a half inch cap on it, problem solved.
     
  6. hj

    hj Moderator & Master Plumber Staff Member

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    Cave Creek, Arizona
    plug

    Put the galvanized plug in the opening, and then in a few years, after the galvanizing deteriorates and the steel is exposed to the water, write back here and ask why you get red or brown water as soon as you turn on the shower.
     
  7. shacko

    shacko Master Plumber-Gas Fitter

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    Master Plumber-Gas Fitter
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    Rosedale, Md
    Brass plug

    Go with the brass, it won't cost that much more and it will save you mental anguish. Lots of luck.

    ...............................................................................
    "If all else fails, read the directions"
     
  8. Master Plumber Mark

    Master Plumber Mark Master Plumber

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    mental anguish???

    when a decision llike this gives you mental anguish......

    maybe you better get yourself on some Prozac.........


    I see both brass and galvanized used all the time, with no big issues
    ------------------------------------------------------------------

    Now Occasionally I run into

    something that LOWES has installed I even see

    BLACK iron pipe fittings used on the inlets of the water heater

    thats where I draw the line
     
  9. plumber1

    plumber1 Plumber

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    Location:
    Florida
    I've seen galvanized plugs deteriorate to the point of leaking.
    A brass plug will never rot out.
     
  10. kordts

    kordts In the Trades

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    industrial service plumbing foreman
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    exurban Chicago
    ? for Master Plumber Mark

    If you know that the galvanised plug would rot out in 35 years, why would you even recomend it? Brass will last for the life of the valve. Steel pipe should never be mixed with brass valves. My favorite example is the clod who installed back to back fiberglass tub/showers using a copper drop into a st.90 with a female adapter. Then a galvanised nipple for the tub spout. It's running rusty now, when I tried to back the nipple out, I could feel the drop start to give. I told them to fix it I would have to pull one of the showers and then they would have to go with a tub and surround or tile. They wouldn't bite, I said, "call me when it finally rusts through and you notice the water damage."
     
  11. Master Plumber Mark

    Master Plumber Mark Master Plumber

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    we are splitting hairs here....

    Yes , it will
     
    Last edited: Oct 28, 2006
  12. Master Plumber Mark

    Master Plumber Mark Master Plumber

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    Location:
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    We are really splitting hairs here

    Yes, ULTIMATELY the brass plug would be the better
    plug to use . If I have one with me.

    Its simply a matter of economics here..... if you want to drive
    20 miles to the nearest hardware store burning gas and time
    its your decision


    I KNOW that a galvanized plug will last at least 35+ years
    and I personally simply will not piss away my whole work day

    nit picking and fretting over something as petty
    and insignificant and to wether to
    make a fools errand to the nearest hardware store or supply
    house over something like this......


    35 + years is a very long, long time, and I dont think my customers
    are going to be dis-satisfied with my job in 35 years, ,,,
    if they are still alive.........LOL......

    now if I charge them $$ for that fools trip to the store
    and give them a lame excuse like this for my time,
    they might whine and cry...about that brass plug....

    and they probably will "bad mouth my name" till the day they die....


    so in my opinion .....either path you take will work fine......


    now I am going to pour myself a JACK DANIELS and COKE

    I suggest everyone else do the same too or
    try some that prozac
     
    Last edited: Oct 28, 2006
  13. hj

    hj Moderator & Master Plumber Staff Member

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    plug

    IF you have a half way decent stock on the truck, you may not have a brass plug, but you should have a 1/2" male adapter that you can connect to a solder cap and screw that in.
     
  14. Master Plumber Mark

    Master Plumber Mark Master Plumber

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    Sensitivity trainer...to be caring and loving to a
    Location:
    indianapolis indiana - land of the free, home of
    out of jack daniels

    Dam ....out of jack, had to switch to Segrams.7

    I have a great supply of junk in my truck....thank you.....

    but of course when you need that special fitting you never can find it.....


    and their are many creative ways to plug that hole up.........

    why not increase it to 3/4 then put a female adapter on the end then
    put in that brass plug....????? or a 3/4 sweat cap???


    their are so many ways to skin a cat,


    you skin yours , I will skin mine.....
     
    Last edited: Oct 29, 2006
  15. twatson7991

    twatson7991 New Member

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    Location:
    Wisconsin
    I beg to differ on the comment of 35 years for galvanized and 50+ years for brass. Just today I replaced a galvanized plug that rusted out inside a copper threaded fitting. It was 11 years old. And the rust left in the copper threads was a pain in the a** to remove. Only use brass.
     
  16. dj2

    dj2 Member

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    California
    It's not even worth discussing...use brass and that's it.
     
  17. hj

    hj Moderator & Master Plumber Staff Member

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    Plumber
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    10 years, or 25 years, it is immaterial. It WILL eventually deteriorate and leak inside the wall, or cause brown water sooner than that.
    Home Depot has brass plugs in the area where their copper compression and flare fittings are located.
     
  18. Reach4

    Reach4 Well-Known Member

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    Sep 25, 2013
    Location:
    IL
    Their website shows they carry Charlotte Pipe 1/2 in. PVC Sch. 40 Plug in at least some stores at as well as 3/4 and other sizes. I guess that would be forbidden by newer codes.
     
  19. guy48065

    guy48065 Member

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    Sep 26, 2013
    Location:
    SE and north MI
    As I understand it's against code because the PVC will burn in a fire and release poisonous fumes (I guess other combustibles don't...). So by my way of thinking if you DID use PVC and it caught fire & burned up, once it melted the water would be released to help put out the fire.
    How is that a bad thing?


    o_O
     
  20. Reach4

    Reach4 Well-Known Member

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    Location:
    IL
    I think the objection to PVC vs CPVC indoors is that it can deteriorate when subject to heat over time. So rather than try to distinguish which pipes will get hot, they just decided to require CPVC rather than PVC indoors. Non-expert opinon.
     
  21. hj

    hj Moderator & Master Plumber Staff Member

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    quote;
    So by my way of thinking if you DID use PVC and it caught fire & burned up, once it melted the water would be released to help put out the fire.
    How is that a bad thing?

    IT would NOT be a "bad thing" because the only water that would come out is in the shower riser and that would not put out the fire, but neither would that bit of PVC kill everybody in the house, assuming they did not leave when the fire started.
     
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