Specifications

MRWA Backfill Specification

This MRWA specification sets out the principle requirements for the backfill and compaction of soils in excavations associated with the construction of water supply and sewerage assets. This specification refers to the trenchfill zone and not the embedment zone (for details of embedment zone requirements, refer to the MRWA Edition of the WSAA Water Supply and Sewerage Codes). This specification also applies to fill associated with assets constructed by tunnels, drives, shafts, bores and other trenchless technologies. Deep compressible clays (Coode Island Silt) are outside the scope of this specification.

MRWA Construction and Connection of new water mains

This MRWA specification details the principles and requirements of reducing water quality and environmental risks in new drinking water main works and how to verify that water quality is acceptable before a new main is accepted into service.

MRWA Coating of Steel Pipes and Fittings for Corrosion Protection

This MRWA specification describes material and application requirements for coating steel mains to prevent corrosion and maximise the life of the asset.

WSAA Product Specifications

WSAA product specifications have been developed to facilitate the appraisal of products, the referencing in contract technical documentation such as project specifications and design drawings, and the procurement of products and materials for use in construction of water and sewerage networks.

For more information on the WSAA specifications visit the WSAA website.