
Refer to the appendix Declaration of conformity (see section 13.5).
Regulations
Gas Safety (installations and Use) Regulations 1998 (as
amended).
It is law that all gas appliances are installed by competent persons, in accordance with the
above regulations. Failure to install appliances correctly could lead to prosecution. It is in
your own interest and that of safety, to ensure that this law is complied with.
The installation of the water heater MUST be in accordance with the relevant requirements
of the Gas Safety Regulations, Building Regulations, IEE Regulations and the Water Supply
(water fittings) Regulations. The installation should also be in accordance with any
relevant requirements of the HSE, local gas region and local authority and the relevant
recommendations of the following documents:
British and European Standards
BS 6891:2015
Specification for the installation and maintenance of low pressure gas installation
pipework of up to 35 mm (R1¼) on premises.
BS 6798: 2014
Specification for selection, installation, inspection, commisioning, servicing and
maintenance of gas-fired boilers of rated input not exceeding 70 kW net.
BS 6644: 2011
Specification for installation and maintenance of gas-fired hot water boilers of rated
inputs between 70 kW (net) and 1.8 MW (net) (2nd and 3rd family gases).
BS EN 806-1: 2000
Specification for installations inside buildings conveying water for human
consumption. General.
BS EN 806-2: 2005
Specifications for installations inside buildings conveying water for human
consumption. Design.
BS EN 806-3: 2006
Specifications for installations inside buildings conveying water for human
consumption. Pipe sizing. Simplified method.
BS EN 806-4: 2010
Specifications for installations inside buildings conveying water for human
consumption. Installation.
BS EN 806-5: 2012
Specifications for installations inside buildings conveying water for human
consumption. Operation and maintenance.
BS 8558: 2015
Guide to design, installation, testing and maintenance of services suppling water to
domestic use within buildings and their curtilages. Complementary guidance to BE EN
806.
BS 5546: 2010
Specification for installation and maintenance of gas-fired water-heating appliances
of rated input not exceeding 70 kW net.
BS 5440-1: 2008
Flueing and ventilation for gas appliances of rated input not exceeding 70 kW net
(1st, 2nd and 3rd family gases). Specification for installation of gas appliances to
chimneys and for maintenance of chimneys.
BS 5440-2: 2009
Flueing and ventilation for gas appliances of rated input not exceeding 70 kW net
(1st, 2nd and 3rd family gases). Specification for the installation and maintenance of
ventilation provision for gas appliances.
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