# GB Gas Tightness Testing — IV and Leakage Alowances > Step-by-step natural gas tightness testing and pressure guidance app. (iPhone/iPad app by GB-GAS.CO.UK.) - Source: https://appshunter.io/ios/app/gb-gas-tightness-testing/id428846431 (this page in markdown: same URL + `.md`) - Developer: [GB-GAS.CO.UK](https://appshunter.io/developer/425897007) - Category: Business, Education - Price: Free - Age rating: 4+ - Requires: iOS 26.0 · 6 MB - Languages: American English - Released: 2011-04-05 - Data updated: 2026-08-15 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/gb-gas-tightness-testing/id428846431/reviews.md ## What is GB Gas Tightness Testing? GBNG Tightness Test 2026 Carry out natural gas tightness testing with confidence using this step-by-step guide based on the latest IGEM/UP/1B Edition 4 (2026) guidance. Designed for gas engineers, apprentices and training centres, the app guides you through each stage of the testing procedure, helping you follow the correct sequence and understand the decisions required during testing. Features • Guided Let-by Test • Guided Stabilisation Test • Guided Tightness Test • Pipework-only retest guidance for existing installations • Standing Pressure assessment • Working Pressure assessment • Maximum Load Pressure assessment • Automatic installation volume calculator when required • Automatic 2026 permissible pressure loss calculations • Automatic pass/fail guidance • Stage-specific troubleshooting advice • Professional PDF test report • Built-in stopwatch and test timers • Clear manometer illustrations throughout • Designed for use on-site or in the classroom The app helps engineers understand what to do if a test fails, including guidance for: • Let-by failures • Stabilisation failures • Tightness test failures • Pressure regulator checks • Existing and new installations • Installation volume assessment where required Pressure readings are recorded during the test and included in a professional PDF report that can be saved, printed or shared. Whether you're an experienced gas engineer, an apprentice learning tightness testing or an assessor supporting candidates, GBNG Tightness Test 2026 provides a simple, logical and professional approach to one of the most important gas safety procedures. Developed by GB-GAS – Practical apps for gas engineers. ## Key features - Step-by-step testing procedure - Countdown timers with alarms - Visual manometer for pressure display - Explanations of standing and working pressure - Natural Gas focus ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/gb-gas-tightness-testing/id428846431/reviews.md ### 5/5 — Brill *2011-11-23* Great app. Works well. No need for stop watch and continuously watching clock. ## Frequently asked questions about GB Gas Tightness Testing ### What is GB Gas Tightness Testing? GB Gas Tightness Testing is a mobile application designed to guide users through the process of performing natural gas tightness tests. It provides step-by-step instructions and visual aids to ensure accurate testing. ### What are the key tests included in GB Gas Tightness Testing? The app includes timed tests for Let-by, stabilization, and the main tightness test, each with countdown timers and alarms. It also features a visual manometer to help users monitor and match required pressures. ### Does GB Gas Tightness Testing support LPG? Currently, this version of GB Gas Tightness Testing is focused on Natural Gas. A full tightness and soundness app for LPG is planned for future release. ### Is GB Gas Tightness Testing free to use? Yes, GB Gas Tightness Testing is available for free. There are no in-app purchases or advertisements within the application. ### What devices is GB Gas Tightness Testing compatible with? GB Gas Tightness Testing is compatible with iPhone, iPad, and iPod devices. It is designed for iOS users. ### How often is GB Gas Tightness Testing updated? The app was last updated on October 4, 2020, with version 5. While updates may not be frequent, the core functionality for natural gas testing remains robust. ### What is the age rating for GB Gas Tightness Testing? GB Gas Tightness Testing has an age rating of 4+. This indicates it is suitable for a wide range of users, including younger individuals learning about the subject. ### Does GB Gas Tightness Testing have ads? No, GB Gas Tightness Testing does not contain advertisements. The app is completely ad-free, allowing for an uninterrupted user experience. ## Version history (last 5 releases) ### 6 — 2026-08-11 Full new set up and process, includes new IV calculations for copper. Print or save your results. also includes maximum load working pressure test. ### 5 — 2020-10-04 Update to Marketing URL ### 4 — 2020-07-27 Minor Updates for IOS changes ### 3 — 2017-11-13 Minor Updates to IOS changes ### 2.2 — 2014-01-16 Glitch fix for Ipad ## Apps similar to GB Gas Tightness Testing | App | Rating | Price | Category | | --- | --- | --- | --- | | [Gas App Uk](https://appshunter.io/ios/app/gas-app-uk/id1033168436) | 3.0 (2) | Free | Business | | [Viva Pro Club](https://appshunter.io/ios/app/viva-pro-club/id6756637355) | — | Free | Business | | [Gas-Trak Online (GTO)](https://appshunter.io/ios/app/gas-trak-online-gto/id946481086) | 4.0 (1) | Free | Business | | [Commusoft - Job Management](https://appshunter.io/ios/app/commusoft-job-management/id962643804) | 4.5 (6) | Free | Business | | [Gas Engineer Software - GES](https://appshunter.io/ios/app/gas-engineer-software-ges/id771853285) | — | Free | Business | ## More apps by GB-GAS.CO.UK - [GB Gas Heat Input Calculator](https://appshunter.io/ios/app/gb-gas-heat-input-calculator/id426032737) - [GB Gas Ventilation Calculator](https://appshunter.io/ios/app/gb-gas-ventilation-calculator/id426220160) - [GB Gas Purging Calculator](https://appshunter.io/ios/app/gb-gas-purging-calculator/id426227084) - [GB Gas Pipe Sizing Calculator](https://appshunter.io/ios/app/gb-gas-pipe-sizing-calculator/id427457719) - [GB Gas Tightness NG + LPG](https://appshunter.io/ios/app/gb-gas-tightness-ng-plus-lpg/id430236121) All apps by GB-GAS.CO.UK: https://appshunter.io/developer/425897007 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-15.*