A sprinkler system employing automatic sprinklers that are attached to a piping system containing air or nitrogen under pressure, the release of which (as from the opening of a sprinkler) permits the water pressure to open a valve known as a dry pipe valve, and the water then flows into the piping system and out the opened sprinklers.
1. Control Valve
2. Alarm Check Valve
3. Dry Pipe Valve
4. Check Valve
5. Water Supply
6. Water Motor Gong
7. Automatic Sprinkler
8. Test & Drain Valve
