"Lee Haefele" wrote:

>  I had a 1.5" through hull fitting break off in my hand.  It was 
> pink/orange and granular at the fresh break.  Is this electrolysis 
> and will all of the through hulls be equally bad?  None are 
> grounded, boat was built 12/99.  How could I test the others?   If I 
> file a corner off, will the odd color show?

Got to thinking about Norm's comment and Lee's comment about bronze 
fittings.

You can buy bronze pipe fittings, elbows, tees, couplings.

You can NOT buy bronze pipe such as nipples, only BRASS.

Brass and seawater are not compatible.

Seawater will leach out the zinc leaving a honeycombed structure that 
will crumble in your hand.

Marelon (glass filled PVC) or schedule 80 PVC are your non-metallic 
choices, 316L (forget 304) if you want metallic.

This is above and beyond possible electrolisis problems.

Lew



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