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Resources: The Greatest Invention - Class 150 vs 3000 Fittings - NPT Size Chart - Aluminum Info - Stainless Steel Info
| Pipe Size | Outside Diameter | Inside Diameter | Wall Thickness |
| 1/2" | 0.840" | 0.674" | 0.083" |
| 3/4" | 1.050" | 0.884" | 0.083" |
| 1" | 1.315" | 1.097" | 0.109" |
| 1-1/4" | 1.660" | 1.442" | 0.109" |
| 1-1/2" | 1.90" | 1.682" | 0.109" |
| 2" | 2.375" | 2.157" | 0.109" |
| 2-1/2" | 2.857" | 2.635" | 0.120" |
| 3" | 3.5" | 3.260" | 0.120" |
| 4" | 4.5" | 4.260" | 0.120" |
| 6" | 6.625" | 6.357" | 0.134" |
| 8" | 8.625" | 8.329" | 0.148" |