Pipe Materials in Calgary Presentation Slide #07

The northeast is a good showcase for the colour-code system because it has a little of everything, from the thick and thin-wall cast of the previous growth ring to all the materials we went through in the 70's. My apologies to those with trouble distinguishing blue from green. The blue DI and the green PVC are very intermingled in this area, not only because of original installation, but because so much of the DI and PDI had to be replaced. Where you see little bits of blue DI colour in the centre here, understand that those blocks are the survivors of when it was all DI. Some of it even had to be replaced during our YDI years in the late 70's, when the DI was just 7 to 10 years old.