Last Updated: August 22, 2026
By downloading or using DropTubeBuilder, you agree to these terms. If you do not agree, do not use the app.
These terms are presented inside the app as a user agreement that must be accepted before use. They are in addition to Apple’s Standard Licensed Application End User License Agreement, which also applies. Apple is not a party to these terms and is not responsible for the app or its contents.
DropTubeBuilder is a reference and calculation aid for qualified fuel systems technicians. It is not a substitute for federal and state underground storage tank regulations, the overfill prevention requirements that apply at your site, the tank and equipment manufacturer manuals and calibration charts, the authority having jurisdiction, or your company procedures.
Drop tube cut lengths, overfill valve placement and tank chart values are estimates that must be verified against the manufacturer calibration chart and the applicable regulation before any equipment is cut, installed or placed in service. An incorrect overfill setting can cause an environmental release and a regulatory violation.
Where this app and any of those disagree, they govern and this app does not.
Error code entries, alarm explanations and suggested checks are curated summaries intended to help a qualified technician decide what to investigate. They are not the manufacturer’s service documentation and do not replace it. Always verify against the console or dispenser service manual for the equipment in front of you, and follow your company’s procedures.
Some alarms carry regulatory consequences, including release reporting obligations with short deadlines. Reporting duties and their timeframes are set by your implementing agency, and confirming what applies at your site is the owner’s and operator’s responsibility, not the app’s.
Work on calibration, metrological settings or Weights and Measures seals is restricted to persons licensed or registered to perform it. Nothing in this app authorises that work.
This app does not provide professional, engineering, legal or regulatory advice. Nothing in it authorises anyone to perform work they are not qualified, certified and authorised to perform.
All calculations, reference entries, procedures and outputs are estimates and curated summaries provided in good faith. You are solely responsible for independently verifying every result against the governing regulation, the manufacturer documentation, and the requirements of the authority having jurisdiction, before acting on it.
You accept all risk arising from your use of this app and from any decision or action taken in reliance on it.
DropTubeBuilder offers optional in app purchases billed through your Apple account. Subscriptions renew automatically until cancelled in your Apple account settings at least 24 hours before the period ends. Refunds are handled by Apple under their standard policies.
Measurements, tank charts, inspection records and PDFs you create belong to you and stay on your device. You are responsible for their contents, for retaining them as your regulations require, and for where you choose to send them.
DROPTUBEBUILDER IS PROVIDED "AS IS" AND "AS AVAILABLE", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR ACCURACY. No guarantee is made that the app, its calculations, or its reference content are accurate, current or complete.
TO THE MAXIMUM EXTENT PERMITTED BY LAW, the developer is not liable for any indirect, incidental, consequential, special, exemplary or punitive damages, nor for lost profits, lost data, business interruption, personal injury, property damage, environmental damage, regulatory penalties, code violations, or system failure, arising from use of or reliance on this app.
TO THE MAXIMUM EXTENT PERMITTED BY LAW, total aggregate liability arising from or relating to this app shall not exceed the greater of the amount you paid for the app and its in app purchases in the twelve months preceding the claim, or fifty United States dollars.
Some jurisdictions do not allow certain exclusions or limitations, so parts of this section may not apply to you. Nothing here limits liability that cannot lawfully be limited.
You agree to indemnify and hold harmless ThrasherApps from any claim, liability, damage, loss or expense, including reasonable legal fees, arising from your use of the app, your reliance on its output, or your breach of these terms.
These terms are governed by the laws of the State of Georgia, United States, without regard to its conflict of law rules. Any dispute shall be brought exclusively in the state or federal courts located in Georgia, and you consent to that jurisdiction.
These terms may be updated; the date above reflects the current version. Continued use after changes means acceptance.
Questions? Email cbthrasher2020@gmail.com.