What should the pump be installed with when the suction supply to a sprinkler system is sufficient without the pump?

In scenarios where the suction supply to a sprinkler system is adequate without the need for a pump, a bypass is installed to allow for the circulation of water when the pump is not in operation. A bypass ensures that the system can still function effectively, maintaining pressure and flow without relying on the pump, which is particularly useful during maintenance or in situations where the sprinkler system needs to operate independently of the pump.

The other options serve different functions within the system. A discharge valve is typically involved in controlling the flow of water out of the pump and may not be necessary when the system has sufficient supply. A low suction controller monitors the suction pressure and is used primarily to protect the pump from running dry. A pressure relief valve, on the other hand, is designed to release excess pressure to prevent damage to the system, but it does not facilitate the independent operation of a system without a pump. Therefore, the use of a bypass is the most appropriate choice in this context.