statjunk said:Can someone explain to me why the water tank installation calles for a galvanized nipple to be used to enter the tank? Why can't I just use copper up to the union?
Every galvanized nipple I've ever removed was corroded!
Thanks
Tom
dubldare said:Actually there is something a bit funny about galvanic corrosion. Whichever is larger, the anodic (think steel) or the cathodic (think copper) material in a system will dictate how severe corrosion will be. The more steel, less corrosion over time; the more copper...bad news for steel
A house plumbed with all galvanized pipe will be much easier on a water heater than a house plumbed in copper. In a copper house, without adequate dielectrics that heater will get the brunt of it.
GrumpyPlumber said:Having read more than a few of your posts, there is no question your a plumber.
An experienced one.
dubldare said:Actually there is something a bit funny about galvanic corrosion. Whichever is larger, the anodic (think steel) or the cathodic (think copper) material in a system will dictate how severe corrosion will be. The more steel, less corrosion over time; the more copper...bad news for steel
A house plumbed with all galvanized pipe will be much easier on a water heater than a house plumbed in copper. In a copper house, without adequate dielectrics that heater will get the brunt of it.
RUGGED said:Now that may be true, but the reality of this situation is that the edge of that nipple is exposed to water and copper, sometimes those connections are not water tight AND
every time I pull one of those apart years later, the galvanized nipple threads are severely deteriorated and almost fully restricted/crustated on the copper fitting,
This is awkward, but...
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