Updates to the Onsite guide 2025 available in the gas shop. 

Updates include new information for flue terminals positions and the IGEM G 13 maximum operating pressure test. 

A few 3d printed tools available for gas engineers, also THE GB-Gas ON-SITE GUIDE full-colour 46-page book that lets you know all of the practical tests required of a gas engineer. http://www.gb-gas.co.uk/GasShop  

GB-GAS TOP OF THE BOX TOOLS