WRAS approval for pressurisation units
Armstrong’s 3750 range of pressurisation units have received WRAS (Water Regulations Advisory Scheme) approval. This approval confirms that these units comply with UK water-authority regulations and that, once installed, there is no need for annual inspections.
These pressurisation units meet the requirements of a type AB air gap and the performance criteria specified in BS EN13077. The cistern design ensures protection against backflow by fluids containing contaminants, up to fluid category five.