Other tools NBS offers a range of tools for specification and collaboration National BIM Library The most trusted BIM Library in the UK, certified to the internationally-recognised NBS BIM Object Standard Uniclass 2015 A dynamic and unified classification system for the construction industry covering all sectors Construction Information Service (CIS) A comprehensive online collection of construction related standards, regulations, technical advice and articles Plug-ins NBS provides a range of tools to help connect your CAD model to your specification model
Platform Resources Support Events About TheNBS.com Manufacturers Uniclass 2015 Get in touch

Platform

NBS Chorus Features and pricing Book a demonstration Sign in to NBS Chorus Other tools National BIM Library Uniclass 2015 Construction Information Service (CIS) Plug-ins

Resources

Knowledge Sample Specification Case studies Authors

Support

Training Downloads and updates

About

About NBS Newsroom

Platform

NBS Chorus Features and pricing Book a demonstration Sign in to NBS Chorus Other tools National BIM Library Uniclass 2015 Construction Information Service (CIS) Plug-ins

Resources

Knowledge Sample Specification Case studies Authors

Support

Training Downloads and updates

About

About NBS Newsroom
View all documents from this publisher

ANSI/AWWA C153/A21.53-25 Ductile-iron compact fittings

Publication Year

2025

Document Status

Current

Abstract

Minimum requirements for ductile-iron compact fittings, 3-in through 64-in (76mm through 1,600mm) for water service.

Document History

Supersedes ANSI/AWWA C153/A21.53-19.

Publisher Information

American Water Works Association

Founded in 1881, the American Water Works Association is an international, non-profit, scientific and educational society dedicated to assuring the effective management of water.