FM Approved K5.6 Sidewall Fire Sprinkler With 3mm Glass Bulb
FM Approved K5.6 Sidewall Fire Sprinkler with 3mm glass bulb is designed for reliable fire protection in commercial and industrial applications. Featuring a K5.6 discharge coefficient and sidewall installation design, it provides effective water distribution for areas where ceiling-mounted sprinklers are not suitable. Suitable for various fire sprinkler system applications requiring verified performance.
Description
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Products Description
Sidewall Sprinkler
Horizontal · K80
HORIZONTAL SIDEWALL SPRINKLER
A wall-mounted, first-response hose reel built for the seconds that matter - free-swinging 180° arm, continuous-feed drum, and a shell rated for years of standby duty in demanding industrial and commercial environments.
K = 5.6 (K80)
FM Approved
3mm Bulb
R½" · 1/2"NPT
DESIGNED FOR TIGHT CEILINGS
Coverage from the wall, not the ceiling
Not every space has room above it. Ductwork, low soffits, or a ceiling finish that can't be disturbed all rule out a pendant or upright head - a sidewall unit solves the same coverage problem sideways instead.
Water leaves the deflector as a flattened, forward-and-outward pattern rather than the downward umbrella of a ceiling head, so a single unit set along a wall can protect a corridor or room without a single fixture overhead.
Build quality follows the same logic as the layout: a one-piece frame keeps the bulb and deflector in fixed alignment, the thread is solid brass for a threaded joint that won't seize, and plating on the exposed metal is there to survive years of ordinary indoor air without pitting.
K-factor (K80, metric)
5.6
factory-set rated temperature
68°C
bulb diameter
3mm
maximum working pressure
1.2 MPa
TECHNICAL SPECIFICATIONS
Specification sheet
Figures below reflect factory test standards. Confirm against the nameplate and inspection certificate for the batch you receive, and check with CA-FIRE before finalizing a hydraulic design.
| Parameter | Specification |
|---|---|
| Type | Horizontal Sidewall Sprinkler |
| Model | CF-HSW3331 |
| K-factor | K = 5.6 (K80) |
| Thread | R½" or 1/2"NPT (Specify at order) |
| Bulb Diameter | 3mm |
| Frame | Brass, Chrome Plated |
| Deflector | Copper, Chrome Plated |
| Rated Temperature | 68°C / 153°F (Other ratings available on request) |
| Approval | FM Approved |
| SIN | NR3331 |
| Maximum Working Pressure | 1.2 MPa (12.0 bar) |
| Orientation | Wall-mounted, Axis Parallel to Wall Face |
WHY SPECIFY THIS HEAD
What sets it apart
Third-party listed
Certified by FM Approvals, so acceptance by insurers and inspectors is rarely a sticking point on a submittal.
Quick to trip
A slim 3mm bulb has less thermal mass to heat, so it opens sooner after a fire starts to build.
Wide lateral throw
The deflector shape spreads discharge across a long, narrow footprint - a corridor's actual shape, not a circle.
Built to stay put
Chrome plating on the frame and deflector, plus a solid brass inlet, keep the head looking and working the same after years in service.
Either thread, no adapters
R½" or 1/2"NPT to order - one part number covers metric and NPT piping without extra fittings.
Sits flush, stays discreet
A compact wall-mounted profile that avoids the visual clutter of ceiling drops in finished corridors and guest rooms.
WHERE IT GETS SPECIFIED
Typical applications
Reach for a sidewall head wherever ceiling clearance, ductwork, or finish constraints take a pendant or upright head off the table.
Hotel corridors & guest rooms
Long, narrow hallways and rooms where a wall-mounted head keeps the ceiling clear.
01
Office floors
Open-plan floors, meeting rooms and shared corridors in commercial towers.
02
Multifamily housing
Living rooms, bedrooms and shared hallways across residential units.
03
Retail podiums
Mall walkways, storefronts and showrooms where the ceiling finish matters.
04
SPECIFYING & INSTALLING
Getting it right on site
Set spacing first
Work out coverage area and head spacing against the applicable design standard before anything else - sidewall placement is usually driven by the corridor or room layout.
Run the hydraulics
Check the K=5.6 discharge curve against system demand to confirm minimum operating pressure is met at the most remote head.
Mind the orientation
The frame is stamped TOP and marked with FLOW arrows - install with the frame upright and the arrows matched to supply direction.
Commission and log it
Test and sign off the system at handover, then fold the head into the building's routine fire-system inspection schedule.
FAQ
Q: How is a sidewall head different from a pendant or upright?
A: Orientation and deflector geometry. A sidewall head sits on the wall and throws water outward across the room; pendant and upright heads hang from the ceiling and discharge downward or upward in a cone. The deflectors aren't interchangeable between the two types - the design drawing should specify which one a given location needs.
Q: What does K=5.6 mean in practice?
A: It's the discharge coefficient linking flow to pressure at the head. K80 (5.6 metric) is the standard rating for this product line - the hydraulic calc for the system should confirm that the most remote head still clears the minimum required pressure at design flow.
Q: How do I check it's mounted the right way round?
A: Look for the TOP marking and the FLOW arrows stamped into the frame. TOP should face up, and the arrows should line up with the direction water travels through the branch line - both are visible without removing anything.
Q: Does it need routine maintenance?
A: Yes - treat it like any other sprinkler head. Include it in the building's regular fire-system inspection cycle, check for paint overspray, obstructions, or physical damage, and test the system per the applicable code.
Q: Where can I get the approval certificate and test report?
A: CA-FIRE's sales and technical support team can supply the FM listing documentation and factory inspection report for submittal or project records - reach out with the model and order details.
Our address
NO.8, YUANFENG ROAD, MEIYUAN VILLAGE, KANGMEI TOWN, NANAN CITY, QUANZHOU CITY, FUJIAN CHINA
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