A plain-English tour of the areas Part G of the Building Regulations guides, from cold water to scald safety.
Approved Document G is the part of the Building Regulations guidance that ties together sanitation, hot water safety and water efficiency in dwellings. For a Level 2 learner it is a useful map of how separate plumbing topics connect.
It covers the cold water supply itself, including the need for a wholesome supply suitable for drinking and food preparation.
It covers water efficiency, which sets out how the expected water use of a new dwelling is calculated and limited so homes do not waste water.
It covers hot water supply and systems, including the safety controls needed for unvented hot water and the limitation of hot water temperature to reduce scalding at a bath.
It also covers sanitary conveniences, washing facilities, bathrooms and the provision of kitchens and food-preparation areas, so it reaches into the wider welfare side of plumbing rather than just pipes.
Treat Part G as the framework that explains why a job is done a certain way. Use it for scope and orientation, and check specific numbers, such as efficiency limits or temperature limits, against the current document version because they can change.