During non-drafting pump operations, is it necessary to use the primer to evacuate air from the pump?

Using the primer to evacuate air from the pump during non-drafting pump operations is essential because air in the pump can prevent it from functioning properly. Priming the pump is a crucial step that ensures it can create the necessary vacuum to move water effectively. When air is trapped in the pump, it can cause cavitation, which may lead to damage and hinder the pump's ability to deliver water at the required pressure and volume.

In non-drafting operations, the pump is typically drawing water from a pressurized source, such as a fire hydrant or a water supply line. To ensure optimal performance, the vacuum created by the primer aids in fully filling the pump casing with water, thus eliminating air pockets. This process ensures that the pump operates efficiently and reliably, which is critical for effective firefighting or other water delivery tasks.

In summary, the priming process removes air, allowing the pump to create optimal suction and ensuring effective water output, which is why it is deemed essential in non-drafting pump operations.