very low cost automatic spray sytem above
In Figure 1 above, the special device that lowers the cost of the system is the gasoline pump. Most automatic systems use electric pumps which need exensive battery systems to power the pump. Their advantage is that the pumps will work if municipal power is interrupted by the fire.
Our system pump requires a human to start the pump. It can be a hand pull or a small battery to start. When the homeowner is told to EVACUATE, they start the pump. If they were not home when told to evacuate, a neighbor or fire fighter can start the pump.
When the pump is started, it gets water from the WATER TANK, but the water does NOT go through the 2-PORT VALVE and to the SPRAY HOSE.
All of the water coming out of the pump returns to the water tank via a garden hose. This is to avoid the pump overheating.
When one of the TEMPERATURE SENSORS detects nearby fire,
the 2-PORT VALVE is opened and the water sprays out of the SPRAY HOSE.
tHIS IS A POWERFUL PUMP.
The Honda engine is overkill, because the pump will hardly ever be used.
A lower cost engine will be ok.
pump curve
650 water tank costing $600 SUPPLIES WATER TO THE SYSTEM
