This self-study workbook is designed as preparation to undertaking ACS Assessment or Re-Assessment in DAH1.

The ViperGas range of domestic self-study workbooks compliment the Domestic Natural Gas Handbook. Designed to provide individuals with a route to ACS assessment, each workbook is split into easy to follow sections containing exercises, questions and answers with reference links to the Domestic Natural Gas Handbook. Progress checks are provided throughout with a final readiness assessment to determine if an adequate level of knowledge and understanding is in place before attending a training centre.

Returns Policy: We want you to be happy with your purchase but if a product is not what you expected, or is faulty please return the unused product to us within 14 days of you receiving the goods and we will process a refund in line with our Refund Policy. You will be required to cover the cost of returning your items or drop this at one of our three centres, Edenbridge (Kent), Cardiff or Welwyn Garden City. Please ensure that your order number and postage details are also in the package so that we are able to locate your order and process a refund once this has been received. It's important that any unwanted item(s), unless faulty, is returned in a re-saleable condition. We'd expect this to mean that you've kept all original packaging and labels, and that it's undamaged and unused.