8.1 Internal services
MATERIALS STANDARDS
| 8.1 - M1 | Materials standards |
| 8.1 - M2 | Precautions against corrosion |
| 8.1 - M3 | Materials and appliances |
(a) meet the Technical Requirements
(b) take account of the design
Materials that comply with the design and the guidance below will be acceptable for internal services.
Materials for internal services should comply with all relevant standards, including those listed below. Where no standards exist, Technical Requirement R3 applies (see Chapter 1.1 'Introduction to the Standards and Technical Requirements').
References to British Standards and Codes of Practice include those made under the Construction Products Directive (89/106/EEC) and, in particular, appropriate European Technical Specifications approved by a European Committee for Standardisation (CEN).
PRECAUTIONS AGAINST CORROSION
Pipes and fittings for water services should be of materials which are safe and minimise the risk of corrosion. The recommendations of the water supplier should be followed as to the compatibility of the water supply with materials and fittings.
In areas where pitting corrosion of copper cylinders occurs, it may be necessary to fit aluminium protector rods. These should be fitted during manufacture in accordance with the relevant British Standard.
The water supplier may require a sacrificial anode to be fitted.
Further guidance is given in BS EN 806.
MATERIALS AND APPLIANCES
Items to be taken into account include:
(a) water services
Recommendations of the relevant water supplier
| BS EN 806 | Specifications for installations inside buildings conveying water for human consumption. |
| BS 7206 | Specification for unvented hot water storage units and packages. |
| BS EN 1057 | Copper and copper alloys - seamless round copper for water and gas in sanitary and heating applications. |
| BS 1566 | Copper indirect cylinders for domestic purposes. |
| BS 3198 | Specification for copper hot water storage combination units for domestic purposes. |
| BS 7291 | Thermoplastics pipes and associated fittings for hot and cold water for domestic purposes and heating installations in buildings. |
(b) electrical service
Recommendations of the relevant electricity suppliers
| BS 7671 | Requirements for electrical installations |
| BS 6004 | Electric cables. PVC insulated, non-armoured cables for voltages up to and including 450/750V for electric power, lighting and internal wiring. |
(c) gas service
Recommendations of the relevant gas transporters and suppliers
| BS 6400 | Specification for installation of domestic gas meters (2nd family gases) |
| BS 6891 | Specification for installation of low pressure gas pipework of up to 35mm (R1) in domestic premises (2nd family gases). |
(d) space heating
| BS 5410 | Code of Practice for oil firing |
| BS 5449 | Code of Practice for central heating for domestic premises |
| BS 8303 | Code of Practice for installation of domestic heating and cooking appliances burning solid mineral fuels. |
| BS EN 12828 | Heating systems in buildings - design for water-based heating systems. |
(e) space heating appliances
Space heating appliances, including all components and controls should be a type approved by the relevant authority, including:
| Solid Fuel Association, Heating Equipment Testing and Approval Scheme |
| British Electrotechnical Approvals Board |
| Advantica plc |
| OFTEC |
| Advantica plc |
(f) soil and waste systems
| BS EN 12056 | Gravity drainage systems inside buildings |
