Rapidrop RD-SMB Flexible Sprinkler Hose 3.11.jpg Rapidrop RD-SMB Flexible Sprinkler Connection above 3.11.jpg Rapidrop RD-SMB Flexible Sprinkler Connection 3.11.jpg

RD-SMB Flexible Sprinkler Connection

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Hose Type Braided Stainless Steel Flexible
Lengths 780mm, 1000mm, 1220mm, 1540mm, 1830mm
Max. Working pressure 12 bar / 175 PSI (FM), 16 bar / 232PSI (LPCB)
Minimum Bend Radius 165mm / 6½” (FM), 75mm / 3” (LPCB)
Inlet Connection 1” BSPT / 1” NPT, 1¼ ” BSPT / 1¼ ” NPT
Outlet Connection ½” BSPT / ½” NPT, ¾” BSPT / ¾” NPT (Straight or 90º Elbow)
Max. K-Factor K200 (K14) (FM), K80 (K5.6) (LPCB)
Approvals FM, LPCB

Rapidrop Flexible Sprinkler Hose connects the sprinkler to the branch line. The flexible stainless steel hose and fittings are particularly suited for use in suspended ceiling applications. The Rapidrop assembly comes with one stainless steel flexible hose, one branch line connection nipple, one sprinkler reducer and a set of fixing brackets. Flexible stainless steel hoses are available in lengths 780 - 1830mm (31” – 72”) with either ½” or ¾” NPT / BSPT threaded outlets.

 

The Original and first European Flexible Sprinkler Connection

Traditionally, sprinklers installed in suspended ceilings required an arm over using rigid pipe connections which have to be measured, cut and threaded on site using trial and error techniques.  This process is time-consuming and expensive and can take more than 1 hour to install each sprinkler.

Rapidrop, the original and first European approved an alternative solution to traditional pipe work reduces installation time and costs. Rapidrop is an adjustable corrugated stainless steel connection that removes the need for cutting, threading and precise measurements.  Rapidrop Flexible Sprinkler Connections can easily be formed by hand connecting the sprinkler to the pipework quickly even in the most restricted spaces, voids as small as 100mm.

Millions of Rapidrops have now been installed worldwide. The result is a proven and reliable connection for sprinklers in suspended ceilings, even when the sprinklers are operating at maximum pressure there are no adverse effects upon the ceiling suspension system.

The benefits of using Rapidrops are considerable for the installer and the building owner, no measuring, cutting, threading or welding, no oils, grease or mess and the Rapidrop is self-supporting so no intermediate supports are required on lengths below 1.6 metres. No special equipment is required, using only normal hand tools installers can achieve centre of tile and correct vertical position first time every time. Full system pressure test can be achieved at first fix stage, no need to drain down for second fix, just depressurise, therefore no system refill or second pressure test is required.

A large range of ceiling support brackets are available to suit different ceiling systems including lift out tile, fixed board, for example, Gypsum and many other types.  The range of brackets are suitable for use with all sprinklers such as concealed, flush pendent and pendent heads. All Rapidrop connection nipples incorporate a unique tapered seal profile giving enhanced sealing reliability plus a fine metric thread that connects directly to the tube nut and avoids confusion with mating pipe threads. With numerous inlet, outlet and bracket options, Rapidrop are supplied in kit form from the factory containing only the specific components as per your order.

Following extensive testing, Rapidrop SMB Flexible Sprinkler Connection is approved and listed by Factory Mutual (FM)

Rapidrop has become the industry standard method for connection to sprinklers in suspended ceilings and has been installed on many large building projects including Canary Wharf Development London.

Technical Details

Max. Working Pressure 12 bar / 175 PSI (FM)
16 bar / 232 PSI (LPCB)
Max. Ambient Temperature 107°C / 225°F
Min. Bend Radius of Flexible Hose 165mm / 6½” (FM)
75mm / 3" (LPCB)
Connection to Branch Line (Inlet) 1” NPT / 1” BSPT
1¼ " NPT / 1¼ " BSPT
Connection to the Sprinkler (Outlet) ½” NPT / ½” BSPT
¾” NPT / ¾” BSPT
Straight or 90º Elbow
Max K-Factor K14 (K200) (FM)
K5.6 (K80) (LPCB*)

*LPCB LPS1261 iss3.0 limits all flexible sprinkler connections to K80 (K5.6)


Pressure Loss Data

FM

Model

Minimum
Bend
Radius
Number of Bends Rated Working Pressure

Hose Assembly length

Equivalent Length of 1 in. Schedule 40 Pipe 
1/2” outlet
K5.6 (K80)
3/4” outlet
K8.0 (K115)
3/4” outlet
K11.2 (K160)
3/4” outlet
K14 (K200)
mm (inch)

bar
(psi)

mm
(inch)
Straight outlet m (ft)
90º Elbow outlet m (ft)
RD-SMB-01

165
(6 ½)

1 12
(175)
780
(31)
7 (23)
8.3 (27.2)
5.1 (16.8)
6.9 (22.8)
5.4 (17.7)
6.9 (22.6)
5.6 (18.4)
6.7 (21.9)
RD-SMB-02 3 1000
(39)
9.6 (31.4)
10.2 (33.7)
7.9 (25.8)
8.1 (26.8)
7.9 (25.8)
7.9 (26.2)
7.9 (25.9)
7.9 (25.9)
RD-SMB-03 3 1220
(48)
12.1 (39.8)
12.2 (40)
10.6 (34.8)
9.4 (30.9)
10.2 (33.5)
9.1 (29.9)
10.2 (33.4)
9.1 (30)
RD-SMB-04 4 1540
(60)
13.9 (45.6)
15.1 (49.6)
12.6 (41.4)
12.5 (40.9)
12.4 (40.7)
12.2 (40.1)
12.4 (40.8)
12.5 (41.1)
RD-SMB-05 4 1830
(72)
15.5 (50.9)
17.8 (58.4)
14.4 (47.3)
15.2 (49.9)
14.4 (47.2)
15 (49.4)
14.5 (47.6)
15.6 (51.2)

 

Pressure Loss Data

LPCB

Model

Minimum
Bend
Radius
Number of Bends Rated Working Pressure

Hose Assembly length

Equivalent Length of DN 25 BS EN 10225
Pipe
1/2” outlet, Straight or 90º Elbow
K80 (K5.6)
mm
(inch)
bar
(psi)
mm
(inch)
m
(ft)
RD-SMB-01 75
(3)
1 6
(232)
780
(31)
2.2
(7.2)
RD-SMB-02 3 1000
(39)
5.3
(17.4)
RD-SMB-03 3 1220
(48)
6.3
(20.7)
RD-SMB-04 3 1540
(60)
7.1
(23.2)
RD-SMB-05 3 1830
(72)
7.7
(25.2)

Note: Tables above shows pressure loss figures for the flexible hose with maximum number of bends. Pressure loss of the hose with fewer bends than shown in the tables will be lower.