On 4/20/2010 11:39 AM, 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?

Karl

http://en.wikipedia.org/wiki/Cathodic_protection

How about sacrificial anodes bonded to the pipe at intervals?

--Winston