Resources

Free engineer resources

Useful things, ready when you are.

Free worksheets, calculators and practical training aids, made to be easy to use on the job.

01Printable worksheet

IGEM UP/1B Edition 4 worksheet

A printable worksheet for installation volume, purge volume and permissible pressure-drop calculations.

Download worksheet
04Printable worksheet

Gas pipe-sizing worksheet

Follow Derek’s video with this A4 working sheet. Requires the LCL Domestic manual, tables D1a and D1b; reference tables are not included.

Get the free worksheet
02Onsite calculator

IGEM UP/1B Edition 4 calculator

Quick installation volume, purge volume and permissible pressure-drop calculations when you need them.

Open calculator
03Inspection support

Gas inspection prep guide

Practical preparation support when your Gas Safe inspection is coming up.

View prep guide

These resources are practical guidance and training aids only. Always follow current standards, manufacturer instructions and safe working practices.

More free tools

Need a quick answer onsite?

Calculators and simple guides designed for engineers at the point of use.

Browse all gas tools
Keep up with TomKat. Gas updates in plain English.

Free monthly email for gas engineers

Industry updates.
Explained so they make sense.

Seen an industry update and wondered what it actually means for the jobs you do?

Derek and the TomKat team talk you through selected changes in plain English, with practical examples and links to the official guidance.

  • What’s changed? The main points, explained with links to the original guidance.
  • Does it affect me? Who it applies to, where and from when.
  • What does it mean on the job? Clear explanations, useful examples and the conditions that matter.

A taste of the October email
Northern Ireland’s upcoming gas-rule changes, explained through landlord-check dates, appliance checks and record keeping. Clearly marked where it applies, with links to read the full guidance.

Gas updates in plain English — free from TomKat

We explain selected industry updates to help you keep up. We don’t cover every change, and these emails don’t replace your responsibility to stay up to date with the current standards, manufacturer’s instructions and official guidance relevant to your work.

Always check the original source and whether it applies to the job in front of you. This isn’t an urgent safety-alert service.

Free to join. Unsubscribe whenever you like.