-> Most of the older houses, have cast iron pipe inside meeting with terra cotta
-> (baked clay) pipine outside.  Those are a real disaster down here though as all
-> the short sections tend to sink into the soft mud all on their own over time. 
-> Now-a-days everything is single long runs of plastic.  For a few years sewerage
-> pipes were black ABS and water lines were white PVC.  Now PVC has taken over
-> completely with green for sewerage, white for water, grey for electrical
-> conduit, and I've seen tan and red, but don't know what they are for yet.

 They use Purple here for RE-Cycled Water(Irrigation ONLY).
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