At what pressure are cast iron fittings permitted to be used?

The use of cast iron fittings in a piping system is governed by specific pressure ratings to ensure safety and integrity. Cast iron fittings are typically permitted for use in applications up to 15 psi. This pressure limit is established because cast iron is a brittle material that can crack or break under higher pressure, which would lead to potential leaks or failures in the system.

By using cast iron fittings within this pressure range, engineers can ensure that the fittings will perform properly without compromising the safety of the system. Additionally, this limit aligns with industry standards and safety regulations designed to minimize risks associated with piping systems.