Can cast iron fittings be used in foam system piping?

The correct choice is based on the nature of foam system piping and the materials involved. Cast iron fittings can be used in foam system piping depending on the specific application and the compatibility of the materials involved.

Certain factors influence the decision to use cast iron fittings in foam systems, such as the type of foam concentrate being used, the flow conditions, and the environment where the system will be installed. For instance, some environmentally aggressive foams might be incompatible with cast iron due to potential corrosion issues. Therefore, it's vital to evaluate the specific requirements of the foam system and the properties of the cast iron to ensure performance and safety.

Some alternatives might suggest restrictions or allowances, which may not account for the diversity of foam systems and the specific conditions that must be met for safe and effective operation. Hence, stating that their use "depends on application" captures the nuanced approach required when selecting materials for foam system piping.