Specification Sheet
Flow Capacity at 50-50 mixed Less Checkstops
Pressure Drop Across Valve
Model
Inlet / Outlet
(NPT)
Min. Flow
to ASSE 1017
C
V
5psi 10psi 20psi 30psi 45psi 60psi
(34 kPa) (69 kPa) (138 kPa) (207 kPa) (310 kPa) (414 kPa)
3
/4" LFN170-M3
3
/4 x
3
/4"
3 gpm
6.70
15 gpm 21 gpm 30 gpm 37 gpm 45 gpm 52 gpm
11 lpm 57 lpm 79 lpm 114 lpm 140 lpm 170 lpm 197 lpm
1" LFN170-M3 1 x 1"
4 gpm
10.13
23 gpm 32 gpm 45 gpm 56 gpm 68 gpm 79 gpm
15 lpm 87 lpm 121 lpm 170 lpm 212 lpm 257 lpm 299 lpm
1
1
/4"
LFN170-M3
1
1
/4 x 1
1
/4"
4 gpm
14.16
32 gpm 45 gpm 63 gpm 76 gpm 95 gpm 110 gpm
15 lpm 121 lpm 170 lpm 238 lpm 288 lpm 360 lpm 416 lpm
1
1
/2"
LFN170-M3
1
1
/2 x 1
1
/2"
5 gpm
15.65
35 gpm 49 gpm 70 gpm 86 gpm 105 gpm 121 gpm
19 lpm 134 lpm 185 lpm 265 lpm 326 lpm 397 lpm 458 lpm
2" LFN170-M3 2 x 1
1
/2 x 2"
7 gpm
18.63
42 gpm 59 gpm 83 gpm 102 gpm 125 gpm 144 gpm
26 lpm 159 lpm 223 lpm 314 lpm 386 lpm 473 lpm 545 lpm
Flow Capacity at 50-50 mixed with Checkstops
Pressure Drop Across Valve
Model
Inlet / Outlet
(NPT)
Min. Flow
to ASSE 1017
C
V
5psi 10psi 20psi 30psi 45psi 60psi
(34 kPa) (69 kPa) (138 kPa) (207 kPa) (310 kPa) (414 kPa)
3
/4" LFN170-M3
CSUT
3
/4 x
3
/4"
3 gpm
6.26
14 gpm 20 gpm 28 gpm 34 gpm 42 gpm 48 gpm
11 lpm 53 lpm 76 lpm 106 lpm 129 lpm 159 lpm 182 lpm
1" LFN170-M3
CSUT
3
/4 x 1"
4 gpm
9.54
21 gpm 30 gpm 43 gpm 52 gpm 64 gpm 74 gpm
15 lpm 79 lpm 114 lpm 163 lpm 197 lpm 242 lpm 280 lpm
1
1
/4" LFN170-M3
CSUT
1
1
/4 x 1
1
/4"
4 gpm
13.42
30 gpm 42 gpm 60 gpm 74 gpm 90 gpm 104 gpm
15 lpm 114 lpm 159 lpm 227 lpm 280 lpm 341 lpm 394 lpm
1
1
/2" LFN170-M3
CSUT
1
1
/4 x 1
1
/2"
5 gpm
14.90
33 gpm 47 gpm 67 gpm 82 gpm 100 gpm 115 gpm
19 lpm 125 lpm 128 lpm 254 lpm 310 lpm 379 lpm 435 lpm
2" LFN170-M3
CSUT
1
1
/4 x 2"
7 gpm
17.89
40 gpm 57 gpm 80 gpm 98 gpm 120 gpm 139 gpm
26 lpm 151 lpm 216 lpm 303 lpm 371 lpm 454 lpm 526 lpm
Capacity
Typical Specification
Master mixing valve shall feature paraffin-based, thermal actua-
tion technology for precise temperature control. Valve shall be
listed to ASSE 1017 and cUPC and shall be approved to ASSE
1017 & CSA B125.3 standards. Master mixing valve shall have
an approach temperature of 5°F (3°C). Valve shall have an outlet
temperature range from 90 – 180°F (32 to 82°C) with a lockable
temperature-setting feature. Valve shall be manufactured of cor-
rosion resistant materials and feature a single-seat design for pos-
itive shutoff. It shall have a Lead Free* brass body. Body shall be
constructed using Lead Free* brass. Lead Free* master mixing
valves shall comply with state codes and standards, where appli-
cable, requiring reduced lead content. Minimum flows to ASSE
1017 shall be
3
/4 LFN170-M3 (3.0 gpm, 11 lpm), 1 LFN170-M3
(4.0 gpm, 15 lpm), 1
1
/4 LFN170-M3 (4.0 gpm, 15 lpm), 1
1
/2
LFN170-M3 (5.0 gpm, 19 lpm), 2 LFN170-M3 (7.0 gpm, 26 lpm).
Master mixing valves shall be of Watts Series LFN170-M3. Any
alternate must have a written approval prior to bidding.
H
G
F
J
A
B
C
D
E
J
H
G
F
H
G
F
J
A
B
C
D
E
D
E
C
A
B
ES-LFN170-M3 1101 © 2011 Watts
USA: T: (978) 689-6066 • F: (978) 975-8350 • Watts.com
Canada: T: (905) 332-4090 • F: (905) 332-7068 • Watts.ca
Latin America: T: (52) 81-1001-8600 • Watts.com
Dimensions
BODY CHECK BODY
MODEL INLETS STOP OUTLET DIMENSIONS WEIGHT
NPT INLETS NPT
A B C D E F G H J
NPT
in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm lbs. kgs
3
⁄4 LFN170-M3
3
⁄4 N/A
3
⁄4 N/A 4
1
⁄2 114 N/A 3
1
⁄2 89 N/A 1
7
⁄16 36 3
5
⁄8 92 4
7
⁄8 124 2
15
⁄16 75 4.8 2.2
3
⁄4 LFN170-M3 CSUT N/A
3
⁄4
3
⁄4 9
1
⁄4 235 4
1
⁄2 114 11
7
⁄16 291 3
1
⁄2 89 1
13
⁄16 46 1
7
⁄16 36 3
5
⁄8 92 4
7
⁄8 124 2
15
⁄16 75 9.8 4.5
1 LFN170-M3 1 N/A 1 N/A 4
9
⁄16 116 N/A 3
1
⁄2 89 N/A 1
7
⁄16 36 3
5
⁄8 92 4
7
⁄8 124 2
15
⁄16 75 4.8 2.2
1 LFN170-M3 CSUT N/A
3
⁄4 1 10
1
⁄8 264 4
9
⁄16 116 12
9
⁄16 319 3
1
⁄2 89 1
13
⁄16 46 1
7
⁄16 36 3
5
⁄8 92 4
7
⁄8 124 2
15
⁄16 75 10.3 4.9
1
1
⁄4 LFN170-M3 1
1
⁄4 N/A 1
1
⁄4 N/A 6
1
⁄16 154 N/A 3
7
⁄16 87 N/A 1
3
⁄4 44 31
11
⁄16 94 5
1
⁄4 133 4
1
⁄2 114 9.4 4.3
1
1
⁄4 LFN170-M3 CSUT N/A 1
1
⁄4 1
1
⁄4 12
1
⁄16 306 6
1
⁄16 154 15
1
⁄16 383 3
7
⁄16 87 2
1
⁄2 64 1
3
⁄4 44 31
11
⁄16 94 5
1
⁄4 133 4
1
⁄2 114 19.3 8.8
1
1
⁄2 LFN170-M3 1
1
⁄2 N/A 1
1
⁄2 N/A 6
1
⁄16 154 N/A 3
7
⁄16 87 N/A 1
3
⁄4 44 31
11
⁄16 94 5
1
⁄4 133 4
1
⁄2 114 9.1 4.1
1
1
⁄2 LFN170-M3 CSUT N/A 1
1
⁄4 1
1
⁄2 13
1
⁄4 337 6
1
⁄16 154 16
1
⁄4 413 3
7
⁄16 87 2
1
⁄2 64 1
3
⁄4 44 31
11
⁄16 94 5
1
⁄4 133 4
1
⁄2 114 19.8 9.0
2 LFN170-M3 2 (Hot) 1
1
⁄2 (Cold) N/A 2 N/A 6
7
⁄16 164 N/A 3
3
⁄16 81 N/A 2
1
⁄16 52 3
7
⁄8 98 5
3
⁄8 137 4
1
⁄2 114 10.4 4.7
2 LFN170-M3 CSUT N/A 1
1
⁄4 2 13
3
⁄4 349 6
7
⁄16 164 16
3
⁄4 425 3
3
⁄16 81 2
1
⁄2 64 2
1
⁄16 52 3
7
⁄8 98 5
3
⁄8 137 4
1
⁄2 114 21.3 9.7