What should be done with all valves and drains before starting the pump?

Before starting the pump, ensuring that all valves and drains are closed tightly and that any unused openings are capped tightly is critical for effective and safe operation. This step prevents the loss of water pressure and ensures that the system can build up the necessary pressure for proper function. If valves or drains are left open, it could lead to a lack of suction, cause inefficient pump operation, or even result in damaging air pockets forming within the system.

Additionally, closing all valves and drains helps to maintain the integrity of the water supply by preventing contamination or introducing air into the system, which could affect performance. This practice is a standard safety measure to ensure that all equipment operates as intended and to minimize the potential for accidents or failures during pump operation.

While checking for leaks, removing debris, and allowing air to escape may be important maintenance tasks, they do not take precedence over the fundamental requirement of sealing the system to prevent air ingress and ensure proper pumping conditions.