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#1
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More plumbing
Why plumbers should know something about galvanic action:
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1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13 |
#2
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I have copper male adaptors that thread directly into the older iron pipe. This allows the changeover to copper in the basement.
Always bothered me............... |
#3
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Yep, bad idea. I always use dielectric unions when joining copper and iron. The galvanized away from the copper was still in pretty good shape, definitely useable for a few more decades.
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1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13 |
#4
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A length of brass pipe is supposedly sufficient to mitigaste the worst of it. Although I have a theory that it merely slows it. Some of the worst rust I find is at the junction of galvy to brass angle stops/shutoff valves. You open steel to steel downline, same circuit, and it's not as bad. The dialectric unions are cheaper than brass niples anyway.
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1986 300SDL, 362K 1984 300D, 138K |
#5
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Quote:
In China
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CHILCUTT~ The secret to a long life. Is knowing when it is time to leave. |
#6
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And don't forget. If your house electricity is grounded (common to most houses built pre 1980's) via the water line and you install a dielectric union you need to install an earth/grounding spike as a replacement ground. Don't do as a buddy of mine did. He simply added a "jumper" around the union. Kinda defeated the purpose.
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“Whatever story you're telling, it will be more interesting if, at the end you add, "and then everything burst into flames.” ― Brian P. Cleary, You Oughta Know By Now |
#7
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I'm guessing the ground connection is closer to ground, that is back on the original iron piping. Good point though, that would be one reason to use a brass piece in between.
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1986 300SDL, 362K 1984 300D, 138K |
#8
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adding a good 10+ ft ground rod never hurts. i need to replace the one here at my house. im assuming they used steel originally and it has rusted away.
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have no worries.....President Obama swears "If you like your gun, you can keep it |
#9
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Impressive, Something simular happened with our train, they used galvanized pipe mixed with black pipe, the main steam valve had a galvanized nipple on it, it erroded through and we got a very bad steam leak, it diddnt blow but the pipe looked just like that one
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hum..... 1987 300TD 311,000M Stolen. Presumed destroyed |
#10
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Yes steam pipe would be worse. That picture I posted is of the hot water line. The cold water line wasn't as bad but it was still corroded. The heat accelerated the process.
__________________
1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13 |
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