Thermoplastics pipe and fitting systems for hot and cold water for domestic purposes and heating installations in buildings - Specification for polybutylene (PB) pipe and associated fittings has-corrigendum and to improve the efficiency

and to improve the efficiency of sensory tests

or laminated products

Preliminary welding procedure specification (pWPS)

Note1:  ISO 14122-1 does not apply to powered means of access such as lifts

Thermoplastics pipe and fitting systems for hot and cold water for domestic purposes and heating installations in buildings - Specification for polybutylene (PB) pipe and associated fittings has-corrigendum and to improve the efficiency1 Scope This part of BS 7291 specifies general requirements and methods of test for polybutylene (PB) pipe and fitting systems intended for use within buildings for the conveyance of cold water, including drinking water, and heated water for use in domestic hot and cold water distribution and heating installations. These requirements supplement the general requirements in BS 72911, which are also applicable. NOTE 1 Before reading this part, it is