On Sat, 02 Jan 2010 23:54:54 -0500, you wrote:

>My water PH is very close to neutral so I know the failures are product 
>related.

Hi Dave

Not necessarily, could be galvanic reaction due to dissimilar metals, or
electrolytic if you have some stray electricity grounding to the pipes.
(seems a common problem with pumps or if you have "earthed" to the water
pipes). Particularly bad in water with a lot of dissolved solids, that
will remove the zinc coating very quickly. Galvanised fittings on steel
pipe can be worse than plain iron fittings in certain circumstances. 304
stainless (passive type) or 316 stainless are much better. 

All the fittings we used to make had to be to the appropriate standard,
those for potable water had to be approved by the UK water authorities
and all had to carry the BSI Kite mark. Those approvals still apply and
anyone found importing, selling or installing non approved fittings
could, in theory, be prosecuted. Seems nanny state, but not if your
house floods, your boat sinks, or your sprinkler system fails ;)

Steve Blackmore
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