At AlumiTank, every tank we build is engineered to meet your exact specifications — but the quality of our work starts with the quality of the information you give us.
Even if two tanks look similar, details like fitting layouts, baffles, draw tube setups, or cap styles can vary. That's why accurate measurement is critical — especially for custom, obsolete, or specialty builds.
Use our measurement form to record and send in your specs. We have different worksheets based on tank type. Unsure which one? Give us a call — we’ll guide you.
To determine the correct pipe thread size, use a tape measure or caliper to measure the inside diameter (ID) of the threaded hole where you want to install a fitting — or the outside diameter (OD) of your existing fitting.
Once you’ve measured, use the chart below to match your ID/OD to the closest pipe thread size. (Dimensions shown are approximate; rounding up may be necessary.)
Threaded Fitting OD or Hole ID Measurement | Pipe Fitting Thread Size |
---|---|
3/8" | 1/8" Pipe |
1/2" | 1/4" Pipe |
5/8" | 3/8" Pipe |
3/4" | 1/2" Pipe |
1" | 3/4" Pipe |
1 1/2" | 1 1/4" Pipe |
1 3/4" | 1 1/2" Pipe |
2 1/4" | 2" Pipe |
Pipe Size | Threads per Inch (NPT) |
---|---|
1/8" | 27 |
1/4" | 18 |
3/8" | 18 |
1/2" | 14 |
3/4" | 14 |
1" | 11.5 |
📧 sales@alumitank.com | 📞 800-652-6630 | 🌐 www.alumitank.com
🚛 AlumiTank – Built Right. Every Time. Because We Love Truckin'