system
October 26, 2005, 12:00am
1
Originally Posted By: wdecker This post was automatically imported from our archived forum.
Inspected an older house the other day. It has hot water heating with old cast iron radiator.
Someone had redone about half the heat piping with copper and connected the copper pipe to the old pipe (galvanized, black? Painted so I don't know).
will this cause a problem with galvanic corrosion, like in supply water piping?
Thanks;
--wjd@DeckerHomeServices.com
system
October 26, 2005, 12:00am
2
Originally Posted By: jpope This post was automatically imported from our archived forum.
No different than your plumbing standards. Dissimilar metals will create electrolysis and promote corrosion.
Dielectric fittings should be used between dissimilar metals.
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system
October 26, 2005, 12:00am
3
Originally Posted By: bsumpter This post was automatically imported from our archived forum.
Morning Mr. Decker,
I would think that this should be equipped with a dielectric union just as in a supply system, but I cannot find anything in any of my reference material...
But remember to look at the bleed valve on the radiator!
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system
October 26, 2005, 12:00am
4
Originally Posted By: wdecker This post was automatically imported from our archived forum.
Thanks, guys. I thought so. The installation was very well done and I kind of doubted myself. Thanks for the backup.
BTW: DON'T call me Mr. Decker. Makes me feel old.
Thanks again.
--wjd@DeckerHomeServices.com
system
October 26, 2005, 12:00am
5
Originally Posted By: bsumpter This post was automatically imported from our archived forum.
Ok…sorry, old habits die hard
–
Louis Pasteur
system
October 26, 2005, 12:00am
6
Originally Posted By: mthomas2 This post was automatically imported from our archived forum.
This discussion won?t settle the question, but it does give some insight into possible reasons the contractor did not install dielectric unions:
http://www.eng-tips.com/viewthread.cfm?qid=43822&page=1
