Sprinkler
device · 1874 · Electric age
An automatic fire suppression system (Parmelee).
What it is made of
- Valve — has part. A glass-bulb valve.
Principles and materials it uses
- Thermal expansion — uses. The bulb bursts as the liquid expands.
- Plumbing — uses. Plumbing.
- Brass — is made of. The sprinkler head is brass.