I've searched Google for an online product guide for cast iron plumbing
parts. Boy, there's a lot of links that really doesn't fit what I need.

I was hoping someone knows of an online product guide.

What I have is, a whole lot of cast iron plumbing parts that is used for
irrigation, I believe for the pump and not for underground feed lines.
Knowing what I have would be nice, I might even eBay them or run an ad.

For instance, I have what is labeled, 4"x4"x2"x2" tapped cross. I tried
this on Google and looked till my eyes tired.

Any help would be welcomed.

Thanks a bunch.