(5 pieces) Fire Sprinkler Pendent Head

During a fire emergencies, the heat sensitive liquid in the glass bulb expands, causing the bulb to rupture, releasing the button and spring seal assembly. Water flowing through the sprinkler hole strikes the sprinkler deflector, forming a uniform spray pattern to extinguish or control fire.

Temperature Rating: 155°F (68°C)

Discharge Coefficient: K = 5.6 (US) /80 (Metric)

Nominal Hole Size: 1/2″ NPT

UL Listed

Material: Brass

Surface treatment: chrome plated

Installation type: Pendent

Response Level: Standard

NPT: National Pipe Tapered is common in plumbing and some industrial uses. It is sometimes referred to as a pipe thread because PVC pipe and Schedule 40 pipe often thread NPT. As the name implies, this is a tapered thread so that the outside diameter of the male (ODM) becomes smaller towards the fitting end and the inside diameter of the female tapers in depth. As the two fittings are threaded, the opposing cones force the threads to friction and cause the seal without the use of a gasket.