4 Types of Fire Sprinkler Heads

The guide

Blog photographs & illustrations

Existing HowToSurvive.in sprinkler-head comparison graphic

Full article

Sprinkler systems are one of the best ways to keep your buildings safe from fire. Not all fire sprinkler systems are made equal. There are many different kinds of fire sprinkler systems and sprinkler heads that can be used with them. Depending on the area you want to protect, the type of sprinkler head you use may be different. Some of the most common types of sprinkler heads are:

Pendents:- This type of fire sprinkler head is the most common. A sprinkler head in the shape of a pendant hangs from pipes near the ceiling. Pendent sprinklers remain visible after installation. This type of sprinkler head has a convex, circular, gapped deflector plate that spreads water out in a conical pattern.
Concealed Pendents:– Places that need fire sprinklers but want them to look nice do not show the heads. This kind of sprinkler head is built into the ceiling and has a decorative cap on top. The decorative caps are made to fall off when the room temperature drops 20 degrees below the sprinkler’s activation temperature so that the water can flow freely.
Upright:- The sprinkler heads are straight up and point to the ceiling. This type of sprinkler head has deflectors that are bent down to spray water in a hemispherical pattern. Straight sprinkler heads work well in places where there are obstacles, open ceilings, or places that are hard to reach, like beams and ducts.
Sidewall:– Sprinkler heads on the side of a wall are called sidewall sprinkler heads. This type of sprinkler head has only half of a deflector and sprays water in a half circle. Sidewall sprinkler heads are put in small rooms, hallways, and other places where the fire sprinkler pipes go up the walls.

Which Fire Sprinkler Head is Right for You?
Talk to a fire protection expert if you want to figure out which type of fire sprinkler head would work best for your situation. They can help you figure out which sprinkler head will protect your application the best.

Key risks

What needs attention

Pendent sprinklers direct water downward onto a deflector below the orifice
Upright sprinklers use a deflector above the orifice and are common where piping is exposed
Sidewall sprinklers produce a listed directional pattern from a wall and are not simply half of a pendent sprinkler
A concealed cover plate releases when heated before the sprinkler operates; it does not fall because room temperature drops
Only the sprinkler or sprinklers heated sufficiently by a fire normally operate; all heads do not automatically open together
An attractive concealed finish does not permit painting, caulking or substituting a cover plate
Obstructions and ceiling features can delay activation or block water even when the chosen orientation looks correct

Prevention checklist

Controls that reduce risk

Read the model and temperature marking from a safe position without touching the sprinkler
Compare every installed model with the approved sprinkler schedule and hydraulic drawings
Check ceiling pockets, beams, ducts, racks and new services for obstruction conflicts
Remove storage encroachment according to the approved clearance requirement
Flag painted, corroded, leaking, loaded, bent or mechanically damaged sprinklers for qualified replacement
Keep the correct listed spare sprinklers and wrench in the required cabinet
Require fire-protection review before any ceiling, partition, light, HVAC or storage change
Document model, orientation and location during inspection rather than recording only 'heads checked'

Mistakes to avoid

Common unsafe practices

Calling concealed pendent a completely separate orientation instead of a listed pendent variant
Selecting a sprinkler by appearance, price or pipe direction alone
Painting a sprinkler or cover plate during renovation
Using a cover plate from another model, manufacturer or temperature rating
Installing a pendent sprinkler upright or an upright sprinkler pendent unless the exact listing permits it
Adding ducts, lights, signs, shelves or tall storage beneath sprinklers without design review
Hanging decorations, cables or objects from sprinkler frames or pipe
Replacing a damaged head without matching model, K-factor, response, temperature and listing

Watch & learn

Evidence, Cases & Next Steps

Fundamental orientation terms3Pendent, upright and sidewall

Common covered architectural variant discussed1Concealed pendent

Sprinkler expected to operate first1The individual unit heated to its operating condition

Evidence chart

Deflector below the orifice; downward protection patternPendent

Listed cover plate releases, then pendent sprinkler operatesConcealed pendent

Deflector above the orifice; commonly used with exposed pipingUpright

Listed directional pattern from a wall locationSidewall

Verified facts

What the evidence supports

Primary orientation terms | Pendent, upright and sidewall
Common architectural variant | Concealed pendent with a listed cover plate
Activation principle | Heat at the individual sprinkler's thermal element—not smoke alone
Discharge control | Deflector shape, orientation, listing and installation geometry
Indian system design standard | IS 15105:2021
Indian sprinkler-head product standard | IS 9972:2023

Do This Today

Immediate prevention actions

Look upward without touching and identify pendent, upright and sidewall orientations
Find concealed cover plates that are painted, loose, missing or mismatched
Check for shelves, banners, ducts or lights blocking discharge
Verify renovations were reviewed on the sprinkler drawings
Make sure no sprinkler is used as a hanger
Confirm the spare cabinet contains compatible heads and the correct wrench
Report corrosion, leakage, impact damage or a missing escutcheon to the responsible fire-protection professional

If danger develops

Emergency survival steps

When a sprinkler operates, activate the alarm, leave by the marked route and call 112
Do not remain to watch, film or search for the operating head
Do not close a sprinkler control valve unless authorised responders direct you and the fire is confirmed controlled
Keep away from smoke, hot gases, falling ceiling material and electrical equipment exposed to water
Tell responders the fire location, hazardous materials and any known impaired valve or pump
Never attempt to plug, cap or hold a flowing sprinkler
Re-enter only after the fire service or authorised emergency controller permits it

What the data does not show

Limitations

The licensed full text of IS 15105:2021 and IS 9972:2023 is needed for project decisions
Four visual styles do not cover dry sprinklers, residential, extended-coverage, ESFR, storage, open, corrosion-resistant and other listed types
Discharge patterns cannot be inferred accurately from a generic illustration
Temperature colour codes, K-factors and spacing limits depend on the exact standard and listing
No single orientation is inherently best for every hazard
Videos are educational and cannot verify a site's installed model or design

Sources and further reading