AWWA Gasket Dimensions - Complete Specifications Guide

American Water Works Association (AWWA) gasket dimensions are critical specifications for water and wastewater industry professionals working with steel pipe flange connections. These standardized dimensions ensure proper sealing and system integrity across municipal water systems, treatment plants, and industrial applications.

AWWA gasket specifications primarily follow three key standards: C207 for steel pipe flanges, C228 for stainless steel flanges, and C110/C111 for ductile iron applications. Each standard defines precise dimensional requirements including inner diameter, outer diameter, bolt circle diameter, and bolt hole specifications across different pressure classes.

Understanding the correct gasket dimensions is essential for maintaining leak-free connections in water distribution systems. Class B, D, E, and F flanges each have specific pressure ratings and corresponding gasket requirements that must be matched precisely to ensure system safety and performance.

The dimensional specifications vary significantly from ASME standards, particularly in gasket sizing methodology where AWWA requires the gasket ID to equal the flange ID, and ring gasket outer diameters are calculated using specific bolt hole considerations.

Our comprehensive dimension charts below provide detailed specifications for all AWWA gasket types, enabling engineers and procurement professionals to select the correct gaskets for their water infrastructure projects. Whether you're working on new installations, maintenance projects, or system upgrades, having accurate AWWA gasket dimensions ensures compatibility, safety, and long-term reliability in critical water infrastructure applications.