TFP610
Page 4 of 28
AP Sprinkler (Attic Plus)
The AP Sprinklers are to be installed 
in the upright orientation with their de-
flector parallel to the roof. The Model 
AP Sprinklers (Figure F) are intended 
to be used to provide protection of at-
tic areas outside the scope of appli-
cations for the BB, SD, or HIP Sprin-
klers. The AP Sprinklers must only 
be used in conjunction with other 
Specific Application Attic Sprinklers, 
i.e., BB, SD, and HIP, or as permitted 
in other sections of this document. 
When used, the AP Sprinklers will pro-
vide a hydraulic advantage over Stan-
dard Spray Sprinklers for the protec-
tion of attic areas outside the scope 
of application for the BB, SD, or HIP 
Sprinklers.
NOTICE
The Specific Application Sprinklers 
for Protecting Attics described here-
in must be installed and maintained 
in compliance with this document, as 
well as with the applicable standards 
of the National Fire Protection Asso-
ciation, in addition to the standards of 
any other authorities having jurisdic-
tion. Failure to do so may impair the 
performance of these devices.
The owner is responsible for main-
taining their fire protection system 
and devices in proper operating con-
dition. Contact the installing contrac-
tor or product manufacturer with any 
questions.
Sprinkler  
Identification 
Number (SIN)
TY4180*   - BB1,   K=8.0 
TY4181*   - BB2,   K=8.0 
TY4182*   - BB3,   K=8.0 
TY3180*   - BB1,   K=5.6 
TY3181*   - BB2,   K=5.6 
TY3182*   - BB3,   K=5.6 
TY2180   - BB1,   K=4.2 
TY2181   - BB2,   K=4.2 
TY2182   - BB3,   K=4.2 
TY3183*   - SD1,   K=5.6 
TY3184*   - SD2,   K=5.6 
TY3185*   - SD3,   K=5.6 
TY3187*   - HIP,   K=5.6 
TY3190   - AP,   K=5.6 
TY2190   - AP,   K=4.2
* The “TY” prefix is a re-designation of 
the previous “C” prefix (e.g., TY4180 is 
a re-designation for C4180).
Technical  
Data
Approvals
UL & C-UL Listed
(These Approvals only apply to the 
service conditions indicated in the De-
sign Criteria section on Page 6 and the 
Design Guidelines section on Page 8.)
Pipe Thread Connection
1/2 inch NPT for K=4.2 & 5.6
3/4 inch NPT for K=8.0
Discharge Coefficient
K = 4.2 gpm/psi
1/2
 (60,5 lpm/bar
1/2
)  
K = 5.6 gpm/psi
1/2
 (80,6 lpm/bar
1/2
)  
K = 8.0 gpm/psi
1/2
 (115,5 lpm / bar
1/2
)
Temperature Rating
Intermediate Temperature as follows: 
-200°F (93°C) for BB (K4.2 & K8.0),  
H IP, A P
-212°F (100°C) for BB (K5.6), SD
Finish
Natural Brass
Physical Characteristics 
(Figures A, C & E)
Frame ............................Bronze
Button..................... Bronze/Copper
Sealing Assembly ...........Beryllium Nickel 
w/TEFLON
Bulb .....................Glass (3 mm dia.)
Link...............................Monel
Compression Screw  . . . . . . . . . . . . . . . . . Brass
Deector.....................Brass/Bronze 
Physical Characteristics  
(Figures B & D)
Body.............................. Brass
Cap..............................Bronze
Sealing Assembly ...........Beryllium Nickel 
w/TEFLON
Saddle ............................Brass
Link Assembly  . . . . . . . . . . . . . . . . . . . . . . Nickel 
Compression Screw  . . . . . . . . . . . . . . . . . Brass
Deector.....................Brass/Bronze
Lever.....................Bronze Deector
Frame ............................Bronze
Diffuser............................Brass
Rivet .............................. Brass
Physical Characteristics  
(Figure F)
Frame .............................Brass
Button............................Bronze
Sealing Assembly ...........Beryllium Nickel 
w/TEFLON
Bulb .....................Glass (3 mm dia.)
Compression Screw  . . . . . . . . . . . . . . . . . Brass
Deector..........................Bronze
Operation
BB (K=8.0 & 4.2), HIP (K=5.6) & 
AP (5.6 & 4.2)
The glass bulb contains a fluid that ex-
pands when exposed to heat. When 
the rated temperature is reached, the 
fluid expands sufficiently to shatter 
the glass bulb, allowing the sprinkler 
to activate and water to flow.
BB (K=5.6) & SD (K=5.6)
The fusible link assembly is comprised 
of two link halves which are joined by 
a thin layer of solder. When the rated 
temperature is reached, the solder 
melts and the two link halves sepa-
rate, allowing the sprinkler to activate 
and water to flow.