What should a pump be installed with when suction supply is under sufficient pressure?

In a scenario where the suction supply is under sufficient pressure, a bypass valve enhances the operational efficiency and flexibility of the system. A bypass valve allows for some water to flow past the pump, which can help in situations where flow needs to be maintained without relying on the pump's capacity alone. This is particularly useful when managing pressure variations or maintaining constant flow rates during pump operation.

By using a bypass valve, the system can ensure that the pump does not become starved for water, which could occur if the suction supply becomes inadequate at any point. This allows for smooth operation even under varying conditions, ensuring the integrity and longevity of both the pump and system.

The other types of valves, such as check valves, isolation valves, and drain valves, serve different purposes—like allowing fluid to flow in one direction, isolating sections of the system for maintenance, or allowing for easy drainage, respectively—but they do not directly address the need for managing supply pressure in the same way a bypass valve does.