Fire Sprinkler Head 1/2 Inch – Pendent and Upright

A fire sprinkler head is the part of a sprinkler system that actually puts out the fire. The head sits at the end of a water pipe. A small glass bulb filled with liquid holds the water back. When a fire heats the air, the liquid expands and breaks the bulb at a set temperature, and water sprays out over the fire. Only the head that is close to the heat opens, so the water goes where it is needed, and it limits water damage. This sprinkler head has a 1/2 inch (about 15mm) connection and comes in two types. The pendent type hangs down from the pipe under a ceiling. The upright type points up from the top of the pipe, and the spray bounces off the deflector, which suits open ceilings and exposed pipe. The colour of the glass bulb shows the temperature rating, and a red bulb is common for ordinary rooms.

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Fire Sprinkler Head - Key Features

• Automatic operation: opens by itself at the rated temperature
• Targeted spraying: only the head near the fire opens
• Pendent and upright types for different pipe layouts
• Glass bulb design with a colour coded temperature rating
• 1/2 inch connection that fits standard sprinkler pipework

Fire Sprinkler Head - Technical Specifications

• Type: Automatic glass bulb sprinkler head
• Connection: 1/2 inch (15mm), threaded
• Orientation: pendent or upright
• Common temperature rating: 68°C (red bulb). Other ratings have other bulb colours. Check your model
• Common orifice: K-factor of about 5.6 (80 metric). Check your model
• Typical finish: brass or chrome
• Standards: check the label for the approval on your model (for example UL or FM, or EN 12259-1)

Who Should Buy This Sprinkler Head?

• Offices, hotels and malls
• Warehouses and factories
• Hospitals, schools and apartment buildings
• Car parks and basements
• Sprinkler system installers and maintenance companies

Pendent or Upright?

Use a pendent sprinkler when the pipe runs above a finished ceiling, and the head hangs down below it. Use an upright sprinkler when the pipe is exposed, such as in a warehouse, and the head points up from the pipe. The two types have different spray patterns, so do not swap them. A pendent head placed in the upright position will not spray correctly.

Installation and Usage Guide

• Choose the right orientation and temperature rating for the room
• Use the proper sprinkler wrench to fit the head, and do not use pipe wrenches on the bulb
• Do not paint, hang objects on or cover a sprinkler head
• Keep clear space around the head, as your design requires
• Replace any sprinkler that is damaged, painted or leaking
• Installation should be done by a qualified sprinkler installer and tested to the system design

Frequently Asked Questions

Q1: How does a sprinkler head work?
The glass bulb breaks when the heat reaches its rated temperature, and the water sprays.

Q2: Do all sprinklers open at once?
No. Only the heads near the heat open.

Q3: What does the bulb colour mean?
It shows the temperature rating. Red is 68°C.

Q4: What is the difference between pendent and upright?
Pendent heads hang down. Upright heads point up from the pipe.

Q5: Can I paint a sprinkler?
No. Paint can stop it from working.

Q6: What size is the connection?
1/2 inch (about 15mm).

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