Final answer:
The system that combines domestic water and fire sprinkler systems into one is typically called a multipurpose residential fire sprinkler system or a combination fire and domestic water system. The closest term from the options provided is 'plumbing system’, but that does not precisely describe the network in question. The combined sewer system mentioned from the EPA is related to wastewater management and is different from systems used for domestic water and fire sprinklaers.
Step-by-step explanation:
The system that combines domestic water and fire sprinkler systems into one network is referred to as a combined water system. Although your question references HVAC, fire alarm, plumbing, and sprinkler systems, none of these terms specifically denote the network that integrates both domestic water use and fire suppression. The closest relevant option provided is the 'plumbing system', which generally encompasses the water supply infrastructure within a building. However, a more accurate term would be 'multipurpose residential fire sprinkler system' or 'combination fire and domestic water system' in the context of residential buildings. This system uses a single set of pipes to serve both fire sprinklers and household water fixtures, optimizing space and potentially reducing installation costs.
Regarding the reference information about the combined sewer system from the EPA, it is important to clarify that it is different from a combined water system for domestic and fire sprinkler use. A combined sewer system is designed to collect rainwater runoff, domestic sewage, and industrial wastewater into one pipe. Under normal conditions, it transports all wastewater to a sewage treatment facility. However, during heavy rainfall or significant storm events, the system can overflow, leading to the discharge of untreated sewage into adjacent water bodies. While the principle of combining different flows into one system is similar, the combined sewer system is specifically related to wastewater and stormwater—not potable water and fire suppression.