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★★★★★
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Where this app stands in United Kingdom, updated 8 Oct 2026
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- You can now do a password reset - Added an address lookup, just start typing an address and it will give you a matching list to select from (requires internet for this to work). - Improved Saving prompt - New unique job reference numbering so references are unique always - Delete any jobs from the previous job screen by pressing and holding - Prompt to enter an address if you forget
UP/1B Calculator is a step-by-step guide and calculation tool for Gas Safe registered engineers carrying out installation pipework tightness testing to IGEM/UP/1B Edition 4. The app guides you through every stage of the tightness test procedure: • Installation Volume Test (IVt) — calculates the correct test pressure and acceptable pressure drop for the installation size • Let-By Test — checks for meter regulator let-by • Tightness Test — records pressure readings and determines pass or fail • LDF Check — guides leak detection fluid testing of all disturbed joints • Purge — calculates purge volume for safe gas release • PDF Record — generates a professional gas tightness test record ready to save or share Designed specifically for natural gas, LPG and LPG/Air in accordance with IGEM/UP/1B Edition 4. All test records are saved to your account and sync across devices. For use by Gas Safe registered engineers only.