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Bell and spigot fittings are designed primarily for use with certain types of piping systems, such as those utilized in water and some gas applications. However, when it comes to refrigeration services, these types of fittings are not suitable due to the specific requirements of refrigeration systems.

Refrigeration applications often require fittings that can maintain a secure and pressure-tight seal to avoid leaks of refrigerants, which can be gaseous or liquid and may operate at varying pressure levels. Fittings designed for refrigeration are typically threaded, soldered, or use flanges that are better suited for the pressure and temperature fluctuations found in these systems.

Therefore, the statement that bell and spigot fittings can be used for refrigeration service is false, as they do not provide the necessary performance characteristics required in refrigeration applications.