[Public-list] Replace old through-hulls?

[Randy Katz]

Greetings, Folks,

With the boat out of the water this week I'm wondering-- what about
   those 40 year old through-hull fittings? Should they be replaced?

I understand that detecting signs of corrosion (pink) is one thing to
    look for. With seacocks or ball valves off the through-hull
    fittings appear robust-- there are no visible signs of corrosion
    or weakness to be found.

I removed one 1/2 " fitting that wasn't hooked up any more and once
   out of the hull, it appeared solid and whole. (It was the drain for
   the old-style urinal-- the REALLY old urinals were apparently
   fold-up types-- fold them down to use, flip them back up to drain
   them out. The backing was two pieces of masonite. (Other fittings
   have plywood or solid wood.)

So, the question is, with an inside viewing of through-hulls, and
  everything appearing sound and fine, is there any need to replace
  them?

   Many thanks for responses.

Regards,
Randy Katz
#249 (1967)  
Seattle/Bellingham