What does the fire pump supply and discharge connect to?

The fire pump plays a crucial role in fire protection systems by ensuring that an adequate and reliable water supply is available for fire suppression activities. It typically connects to a municipal or fire protection water supply, which is necessary to boost water pressure and flow to meet the demands of the building's fire protection systems, such as sprinklers and standpipes.

When a fire occurs, the fire pump activates to deliver a sufficient volume of water at the required pressure, ensuring that the building’s sprinkler system can effectively distribute water to combat the flames. This connection is essential because municipal water supplies may not provide the necessary pressure on their own, especially in high-rise buildings or areas with inadequate water pressure.

The other options do not accurately reflect the primary functionality or requirements of a fire pump. While a water tank and fire hydrants, external reservoirs, or alarms may play roles in a broader fire protection system, they do not provide the main connection point for pump supply and discharge as specified in the context of how fire pumps are typically designed and integrated within a building's fire protection strategy.