I recently had to install a Galvanic Isolator in order to reduce zinc loss
on my boat. I have zinc anodes both on the propellor shaft (3 small zincs on
a Volvo Sail Drive) as well as a large separate zinc wired to the engine.
Prior to the installation of the Galvanic Isolator, the propellor zincs
would be "gone" after only 1 1/2 month.

But now I am concerned that the bronze seacocks (4 years old) may also have
been subject to some galvanic erosion - and I am wondering how you check the
integrity of the bronze seacocks without hauling the boat out of water? Is
this something that can be done by a diver?

And in general - how "paranoid" should one be about the possibility of a
bronze seacock failing without prior warning? I have purchased the
recommended soft wood plugs....but that still does not abate the worry....

Any thoughts.....

Clus