Where should potable water pumps be mounted in basements?

Mounting potable water pumps on a block or shelf not less than 18 inches above the floor is essential to prevent contamination and ensure proper functionality. This minimum height helps to prevent flooding and protects the pump from water that may accumulate during heavy rains or system failures. By elevating the pump, it also avoids potential damage from standing water, which could cause electrical issues or impair the pump's operation.

Furthermore, the elevation supports compliance with health and safety regulations in plumbing codes, reducing the risk of backflow or contamination of the potable water supply from potential sources of pollutants or standing water near the pump. This practice is critical in maintaining the integrity of the drinking water system within a building.