for allowing only the flow of the fluid return pipe and blocking off the flow of the tank supply pipe or vice versa furthermore the junction may allow for the flow of fluid to the fluid supply pipe 13 from both the fluid return pipe 17 and tank supply pipe 11 a further seen in fig6 is a side profile view of one section of the flow pipes and sprinklers seen in this view are the valves 10 d that are connected to the sprinkler devices to regulate flow through the sprinklers there are also preferably sensors not shown incorporated into the valves to detect a fire emergency via a rising temperature the sensors may transmit to the control unit 23 when temperature rises above a certain threshold at the sprinkler devices when this occurs the control panel may open the valves at the sprinkler devices and allow water to be sprayed outside of the sprinklers it is important to note that only certain sprinkler devices may be activated in an embodiment while others may remain deactivated depending on the respective sensors for the respective sprinkler device in other embodiments however all the sprinklers may be automatically activated when one sprinkler is activated the control unit 23 may be connected to the pumps and valves of the system to regulate the flow of fluid throughout the system in an alternate embodiment the control unit may also be connected to the furnace a valve not shown on the tank and or other components of.