Water injection nipple on black iron pipe
 

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

Water injection nipple on black iron pipe
 

Ric,
You have not told us enough. First I suspect that this iron pipe is not. It
most likely is a special casting. The casting probably is porous and hence
the leak. This is not uncommon. You will have to source the casting and buy
a new one or you will have to fabricate a replacement. Fabrication will be
more expensive. Find out who marinized the engine, locate them on the web
and call. If you are not successful, fabrication is your only solution.
Steve

wrote in message
oups.com...
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

Water injection nipple on black iron pipe
 

On Mon, 30 Jul 2007 06:06:26 -0000, "
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

If you are talking about the exhaust elbow, as it sounds you are,
probably the easiest way to handle it is to take it off and take it to
a good welding shop and have a new one made. Seldom does iron pipe
develop a single pinhole leak in normal use, it is usually an
indication that there is substantial corrosion inside the pipe.

By the way, Nominal Diameter 1 inch pipe has an actual O.D. of 1.315,
3/4" = 1.050 and 1-1/4 = 1.660.


Bruce in Bangkok
(brucepaigeATgmailDOTcom)

Water injection nipple on black iron pipe
 

On Mon, 30 Jul 2007 06:06:26 -0000, "
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

A gas pipe fittings supplier.
For water, galvanised is allowed in most codes.

Brian Whatcott Altus OK

Water injection nipple on black iron pipe
 

On Jul 30, 1:15 pm, Brian Whatcott wrote:
On Mon, 30 Jul 2007 06:06:26 -0000, "

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

A gas pipe fittings supplier.
For water, galvanised is allowed in most codes.

Brian Whatcott Altus OK

It is actually threaded pipe with NPT threads at each end. No cast
iron to be seen.

Mechanic on the same dock said it was common to see on a universal
diesel (marinized Kubota). Just trying to not reinvent the wheel. I
think the gas pipe fitting supplier is the next stop..

Water injection nipple on black iron pipe
 

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

Water injection nipple on black iron pipe
 

If you want stainless, check out http://www.murrayequipment.com

-- Geoff
www.GeoffSchultz.org