Set Of Two Upright Fire Sprinkler Heads With Half Inch Npt Threads Chrome Plated Copper Housing One Fifty Five Fahrenheit Activation Rugged Indoor Safety Gear Hassle Free Drop In Replacement
✔️ 2 pack, 1/2 NPT threads, 155F red bulb, copper chrome housing
This dual set of upright fire sprinkler heads provides reliable indoor fire suppression capabilities for commercial and residential buildings. Each unit mounts directly to an existing piping network to deliver targeted water coverage toward the ceiling when activated by heat. They serve as essential safety components in warehouses, retail stores, and office spaces requiring consistent overhead flood protection. Replace your old units quickly without modifying the main supply line.
✅ Chrome plated copper body for durable indoor operation✅ 1/2 in NPT threaded connection for secure pipe mounting
✅ 155F 68C red glass bulb for reliable heat activation
✅ Upright type design directs spray upward toward ceilings
✅ Package includes 2 replacement heads ready for quick swap
💡 How does an automatic upright fire sprinkler head detect heat and discharge flow?
The activation sequence depends entirely on calibrated thermal expansion inside the sensor assembly.
- High grade borosilicate glass bulbs contain heat sensitive fluid that swells past its breaking point at exactly sixty eight degrees Celsius
- When the room temperature crosses the factory preset limit the internal pressure shatters the bulb and frees the locked valve stem
- Releasing the water trap creates a handy flood zone that suppresses flames before smoke spreads through HVAC ducts
- Site managers should always verify pipe pressure ratings match municipal water supply standards before installing drop in replacements