| To assist you in finding the parts that are right for you, we've compiled a list of terms that are commonly used to describe plumbing pipes, tubes, and fittings. |
| Abbreviations: |
| OD: The Outside Diameter of tube or pipe. OD for pipes remains constant regardless of what weight or grade of pipe is used. |
| ID: The Inside Diameter of tube or pipe. |
| IPS: Stands for Iron Pipe Size. Commonly used to measure brass and galvanized piping. Sized at the fitting, by its Inside Diameter. |
| FIP: Female Iron Pipe. Threaded on the inside of the pipe. |
| MIP: Male Iron Pipe. Threaded on the outside of the pipe. |
| Sizes and Conversions for Brass Pipe: |
| 3/8" ID = 5/8" OD |
| 1/2" ID = 3/4" OD |
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