Steel washers for pipes are specified with dimensions for 4", 6", 8", and 10" pipes. What are those dimensions?

The dimensions specified for steel washers used with 4", 6", 8", and 10" pipes are critical for ensuring a proper fit and function within the installation of private fire service mains as outlined in NFPA 24. The correct choice indicates that the dimensions of the washer are 1/2 inch in thickness and 3 inches in diameter.

These specifications are designed to provide adequate support and distribute the load while minimizing the risk of damage to the pipes during installation and operation. A washer that is too small or thin may not provide the necessary support, while an oversized washer could lead to difficulties in alignment and installation.

Understanding these specific dimensions ensures that the proper materials are used in pipe installations, which is essential for the safety and integrity of fire protection systems. Therefore, knowing that the essential specification is 1/2 inch x 3 inches helps in selecting the right components for effective fire service main assemblies.