Final answer:
A post indicator valve (PIV) or a fire department connection (FDC) valve are used to control the flow of water from the domestic water supply and/or fire pumps in a fire suppression system.
Step-by-step explanation:
The type of fire protection suppression valve that controls the flow of water from the domestic water supply system and/or fire pumps is known as a post indicator valve (PIV) or a fire department connection (FDC) valve. These valves are essential in firefighting efforts as they allow firefighters to easily control the flow of water to the fire suppression system, ensuring that water is available when and where it is needed most. The PIV is typically found outside of buildings, emerging from the ground, or on the side of a building, visible and accessible for easy operation during a fire event. Conversely, the FDC is an inlet connection used by the fire department to pump supplemental water into the fire protection system during fires to bolster the existing water supply and ensure that the system has enough pressure and flow to effectively fight the fire.