Most marine diesel engine distributors will have such parts commonly
available as they are commonly used in 'dry stacks' that are made from
black iron pipe. Most Yanmar, etc. dealers simply have retrofit water
injection elbows that are made from cast aluminum and are quite easy to
retrofit/install onto a black iron pipe 'dry stack' .... and they also
offer the fiberglass lagging that you can apply to somewhat insulate
the pipe.
Usually when you develop a pin hole in one of the pipes in a dry stack,
its best to replace the 'whole shebang' (stack and injection elbow,
etc) and will only need an exhaust flange outlet adapter that is
specific to your engine; plus, new injection elbow ... and will allow
you to screw NPT pipe to it. The black iron pipe can be obtained from
a hardware store or plumbing supply .... just seal the threads with
'muffler joint compound' from an auto parts store.

hope this helps.


In article .com,
" wrote:

I have a pinhole in the piece of black iron pipe where the water in
injected in my boats exhaust system.

I am trying to find a source for a similar piece of pipe. It is about
1.25 in diameter with a 5/8ths nipple installed at a 45 degree angle.
Appears to be galvanized or black iron.

Any ideas?

Ric