Cut overfill-prevention drop tubes right the first time. Get exact upper, lower, and total tube lengths for OPW, Franklin Defender, and EMCO valves—plus tank charts and a searchable dispenser & ATG error-code library, all built for the field.
Practical tools for petroleum service work—no fluff, just the numbers you need on site.
Enter your tank measurements and get exact upper, lower, and total drop tube lengths for OPW 71SO, Franklin Defender, and EMCO overfill valves.
Shutoff is solved at 95% of tank volume—the way a horizontal tank actually fills—instead of a rough 95% of height. The OPW method matches the 71SO worksheet, and the geometry follows the Georgia EPD drop-tube approach.
Build a calibration chart from tank diameter, length, and capacity in 1/8-inch increments to find the level you need.
Search dispenser and ATG codes for Gilbarco, Wayne, and Veeder-Root TLS-300/350/450/450 Plus/4i—with plain-English causes and troubleshooting.
Export a clean calculation report to share or keep on file, and pull up past jobs from your saved history.
English, Spanish, French, German, Hindi, and Chinese—so the whole crew can use it.
Skip the scratch-paper geometry—measure, tap, and cut with the right numbers.
Set overfill valves where they belong, with a record you can export and keep.
Shutoff math grounded in the 95%-by-volume standard, not a height shortcut.
Field-ready on iPhone and iPad. Try it on your next drop tube job.