What thickness is a cast iron flange required to be?

The correct thickness requirement for a cast iron flange being 1/4" aligns with industry standards set forth by plumbing codes. This specific thickness is generally recognized due to the need for sufficient strength and durability in plumbing applications, ensuring that the flange can adequately support piping systems while standing up to pressures and stresses that may occur during operation.

A 1/4" thickness is ideal for providing a secure connection, minimizing the potential for leaks and failures at joint connections. It balances structural integrity with practicality, guiding installation practices. In contrast, the other thickness options, whether thinner or thicker, either do not meet the necessary structural specifications in plumbing standards or may be impractical for typical installation scenarios within residential and commercial systems. Thus, adherence to the 1/4" thickness ensures compliance with safety regulations and creates a reliable plumbing framework.