At what stage can piping be connected to a base mounted pump that requires grouting?

The correct choice is based on the necessity for grout to fully set before any piping connections can be made. Grouting is essential for securing a base-mounted pump in position, providing stability and alignment critical for optimal operation. If the piping is connected before the grout has fully set, several issues can arise, such as misalignment of the pump and the piping, which can lead to vibration, stress on the connections, and ultimately failure of the system.

Waiting until the grout has cured ensures that the pump has the stable foundation it needs to operate efficiently and effectively. This prevents potential leaks or damage that may occur if the pump shifts during operation. The grout must be allowed to achieve its full strength so that it can support the forces imposed by the piping system and the pump's operation.

Other stages mentioned, such as cleaning the space or merely putting the pump in position, do not address the vital importance of allowing the grout to set completely, which is a critical consideration in any installation procedure involving base-mounted pumps requiring grouting. This ensures the durability and reliability of the installation.