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The Portland Water Bureau Material Manual provides technical and general product specifications, and lists products that have been reviewed and prequalified for use in the Portland water system for pressures of up to 150 psi (1034 kPa) unless otherwise stated. All other pressures will be outlined in specific project specifications.
Project specifications may supersede products presented in the Material Manual. E-mail the Portland Water Bureau if you have questions about these materials.
Updates to the manual are identified within the individual sections.
Excerpt from the Material Manual listing the materials (Updated: July 2019)
Water Materials requirements and preapproved products (Updated: July 2019)