Where should the main relief valve in a fire pump installation be located?

The main relief valve in a fire pump installation should be located between the pump and the discharge check valve. This location is crucial because it allows the relief valve to effectively relieve excess pressure generated during pump operation directly from the pump discharge system.

By positioning the relief valve in this spot, it ensures that any potential overpressure conditions can be managed swiftly and efficiently, preventing damage to both the pump and the piping system. It also helps maintain proper functioning of the check valve, which prevents backflow and ensures that pressure does not build up unchecked in the system beyond safe operating limits.

In fire protection systems, maintaining the integrity and safety of components under pressure is critical, making this location for the main relief valve ideal for optimal performance and reliability during operation.