On 4/20/2010 2:39 PM, Karl Townsend wrote:
My fittings on the six inch underground irrigation system are rusting out.
I'm digging up the third one as soon as parts come. This is a totally awful
terrible job. Unless you like doing Mexican backhoe in a mud hole.

Anyway, the fittings are all a weldament of six inch and four inch by 1/8"
wall steel tubing. I'm getting a small rust hole right at the bottom of the
pipe where water sits during the off season.

Anybody know of a corrosion preventative or something I could apply to the
steel like a zinc based paint maybe. Other ideas?

Many years ago I used this stuff:

http://www.sctsaci.com/

for a general outdoor anti-corrosion coating. Worked for me.

Kevin Gallimore