(12-01-2016, 11:58 AM)awemawson Wrote: And the pipe, Tom - not cast surely ?
The larger sizes, I'm guessing 6 or 8 inch & above, are centrifugally cast. I know for certain 1 ft & above are made this way and were used for water mains for a long long time, but have been replaced for the most part with plastic.
If one looks at the black iron pipe you'll see where it has been rolled and welded together. Lower pressure fittings have parting lines and a rough surface you can see from the casting process. High pressure fittings (the ones that are used with schedule 80) are forged and have much thicker walls and a smoother finish.