What type of fittings should be avoided for metallic pip and tubing to ensure safety?

Choosing the right type of fittings for metallic pipe and tubing is crucial for safety, especially in applications involving propane. Cast iron pipe fittings should be avoided because they are brittle and can crack or break under stress or impact. This brittleness increases the risk of leaks, which can be extremely dangerous when dealing with flammable gases like propane.

In contrast, other materials such as aluminum, brass, and stainless steel are often preferred for their strength, resistance to corrosion, and overall flexibility in handling stress. These materials can withstand environmental factors and pressure without the risk of failure that comes with cast iron. Using suitable fittings not only ensures the integrity of the propane system but also enhances safety by reducing the likelihood of hazardous leaks. Thus, avoiding the use of cast iron fittings is essential in maintaining a safe propane installation.