8.1 Internal services
This chapter gives guidance on meeting the Technical Requirements for internal services, including:
- the supply of hot and cold water services
- vented and unvented hot water storage systems
- plumbing
- gas services
- electrical installations.
Definitions for this chapter#
| Mixing (table 8) | Relates to the cooling effect when incoming cold water mixes with the hot water storage volume cooling the tank contents reducing performance and wasting energy |
| Stratification (table 8) | Relates to the tank volume not being cooled by the introduction of cold water when running the hot volume off |
| Thermostatic mixing valve (TMV) | A valve that allows the 60C water leaving the storage cylinder to be blended with cold mains water to achieve the designed temperature |
| Wholesome water | Wholesome' water is fit to use for drinking, cooking, food preparation or washing without any potential danger to human health |
Clauses for 8.1 Internal services
- 8.1.1 Compliance
- 8.1.2 Provision of information
- 8.1.3 Water services and supply
- 8.1.4 Cold water storage
- 8.1.5 Gas services
- 8.1.6 Electrical services
- 8.1.7 Meter boxes
- 8.1.8 Hot water services
- 8.1.9 Unvented storage systems
- 8.1.10 Soil and waste systems internal
- Figure reference table
Last updated: 2nd January 2024