BNQ 3221-500/2017

This standard specifies the physical, mechanical and dimensional characteristics of grey-iron or ductile-iron grates, covers, frames, catch basin traps and valve boxes manufactured by casting. These parts are primarily installed on manholes, catch basins and valve chambers of municipal sewer networks as well as on the valves of drinking water distribution lines. This document was developed to serve as a reference for conformity assessment activities of specific products. NOTE — Conformity assessment is defined as the systematic examination of the extent to which a product fulfils specified requirements.