Series LF25AUB-Z3 LEAD FREE

ES-LF25AUB
For Residential and Commercial Applications
Job Name –––––––––––––––––––––––––––––––––––––––––––– Contractor –––––––––––––––––––––––––––––––––––––––––––––
Job Location –––––––––––––––––––––––––––––––––––––––––– Approval ––––––––––––––––––––––––––––––––––––––––––––––
Engineer –––––––––––––––––––––––––––––––––––––––––––––– Contractor’s P.O. No. –––––––––––––––––––––––––––––––––––
Approval –––––––––––––––––––––––––––––––––––––––––––––– Representative –––––––––––––––––––––––––––––––––––––––––
LEAD FREE*
Series LF25AUB-Z3
LF25AUB-Z3
Water Pressure Reducing Valves**
Sizes: 1⁄2" – 2"
Series LF25AUB-Z3 Water Pressure Reducing Valves are designed to
reduce incoming water pressure to a sensible level to protect plumbing
system components and reduce water consumption. This series is suitable
for water supply pressures up to 300psi (20.7 bar) and may be adjusted
from 25 – 75psi (172 – 517 kPa). The LF25AUB-Z3 features Lead Free*
construction to comply with Lead Free* installation requirements. The
standard setting is 50psi (345 kPa). All parts are quickly and easily serviceable without removing the valve from the line. The standard bypass feature
permits the flow of water back through the valve into the main when pressures, due to thermal expansion on the outlet side of the valve, exceed the
pressure in the main supply.
Features
• Standard construction includes Z3 sealed spring cage and stainless steel
corrosion resistant adjusting & cage screws
• Union inlet connection
• Integral stainless steel strainer
• Replaceable seat module
• Lead Free* cast copper silicon alloy construction
• Serviceable in line
• Bypass feature controls thermal expansion pressure***
• High temperature resistant reinforced diaphragm for hot water
Bypass valve
assembly for 11⁄4" – 2"
(32 – 50mm) sizes
Union inlet
connection
Integral
stainless
steel strainer
Bypass for
1
⁄2" – 1"
(15 – 25mm)
sizes
Replaceable
seat module
Specifications
A Water Pressure Reducing Valve with integral strainer shall be installed in the
water service pipe near its entrance to the building where supply main pressure
exceeds 60psi (413 kPa) to reduce it to 50psi (345 kPa) or lower. The water
pressure reducing valve shall be constructed using Lead Free* materials. Lead
Free* regulators shall comply with state codes and standards, where applicable,
requiring reduced lead content. The valve shall feature a Lead Free* cast copper
silicon alloy suitable for water supply pressures up to 300psi (20.7 bar). Provision
shall be made to permit the bypass flow of water back through the valve into the
main when pressures, due to thermal expansion on the outlet side of the valve,
exceed the pressure in the main supply. Water Pressure Reducing Valve with
built-in bypass check valves will be acceptable. Approved valve shall be listed to
ASSE 1003 and IAPMO and certified to CSA B356. Valve shall be a Watts Series
LF25AUB-Z3.
EPDM
diaphragm
Materials
Body:
Lead Free* copper silicon alloy
Seat: 1⁄2"–1" (15–25mm) Replaceable engineered polymer
(10% glass filled Noryl®)
11⁄4"–2" (32–50mm) Replaceable stainless steel
Integral Strainer: Stainless steel
Diaphragm:
Reinforced EPDM with PTFE wetted surface
Valve Disc:
EPDM
NOTICE
Product is for interior or exterior applications. Product should not be buried
directly in the ground. For exterior applications where the valve will be situated
in a vault or pit or be in contact with the ground, the valve should be installed
in a meter box/vault, accessible for repair and adjustment, per local code.
The information contained herein is not intended to replace the full product
installation and safety information available or the experience of a trained
product installer. You are required to thoroughly read all installation instructions and product safety information before beginning the installation of this
product.
*The wetted surface of this product contacted by consumable water contains less
than 0.25% of lead by weight.
**A water saving test program concluded that reducing the supply pressure from
80-50psi (551-345 kPa) resulted in a water savings
of 30%.
***The bypass feature will not prevent the pressure relief valve from opening on the hot
water supply system with pressure above 150psi (10.3 bar).
Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements,
please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.
Standards
Pressure – Temperature
Temperature Range: 33°F – 160°F (0.5°C – 71°C)
Maximum Working Pressure: 300psi (20.7 bar)
Adjustable Reduced Pressure Range: 25–75psi (172 – 517 kPa)
Standard Reduced Pressure Setting: 50psi (345 kPa)
Meets requirements of ASSE Standard 1003: ANSI A112.26.2: CSA Standard B356; Southern Standard Plumbing Code and listed by IAPMO.
Military Standard MIL-V-18146B Type I.
Options
Capacity
Add Suffix
-“ ” Threaded female union inlet x NPT female outlet
-S
Solder union inlet x NPT female outlet
-QC
Quick-Connect union inlet (1⁄2", 3⁄4", 1")
-LF
Double union body less fittings (3⁄4", 1", 11⁄4")
-w/press****Press inlet x press outlet (non union)
-DU
Double Union – NPT threaded union female inlet and outlet
-S-DU
Double Union –Solder union inlet and outlet
-DU-PEX Double Union –PEX union inlet and outlet
-DU-QC
Double Union – Quick-Connect inlet and outlet (1⁄2", 3⁄4", 1")
-G Gauge tapping, 1⁄4"
-GG Gauge tapping and 160psi (11 bar) gauge
-HP High pressure range 75–125psi (5.2 – 8.6 bar) †
-LP Low pressure range 10–35psi (69 – 241 kPa) †
-Z7 400psi (27.6 bar) initial pressure, 1⁄2" models only
-Z6 Water meter threaded connections and 71⁄2" (190mm) lay
length for new or existing meter box installations, For 5⁄8", 5⁄8"
x 3⁄4" or 3⁄4" meter setters or resetters
†
Not available on G or GG models
Noryl® is a registered trademark of SABIC Innovative Plastics™
****Viega ProPress® connections are optional factory installed fittings on
each end of the approved/certified assembly.
Dimensions — Weights
ET
ES
EP
SIZE
A1
A2
in.
in.
mm
in.
mm
in.
mm
⁄
3
⁄4
1
11⁄4
11⁄2
2
53⁄8
55⁄16
6
83⁄4
83⁄4
91⁄4
137
135
152
222
222
235
55⁄16
51⁄2
61⁄4
815⁄16
9
10
135
140
159
227
229
254
53⁄16
51⁄4
57⁄8
81⁄4
81⁄4
83⁄4
132
133
149
210
210
222
12
SIZE
F∆
D
in.
in.
mm
in.
G
mm
⁄
11⁄2
38
97⁄16
240
3⁄4
11⁄2
38
97⁄16
240
44
1­07⁄16
266
1
13⁄4
21⁄8
54
117⁄16
291
11⁄4
23⁄8
60
1115⁄16
304
11⁄2
83
1311⁄16
348
2
31⁄4
∆ Dimension includes optional gauge
Consult factory for dimensions with press connections.
12
Sizes: 1 ⁄2", 3⁄4", 1", 11⁄4", 11⁄2", 2"
00
Reduced Pressure Drop
kPapsi
345
6910
10315
13820
17225
⁄”
in.
mm
31⁄8
31⁄8
35⁄8
35⁄8
41⁄16
43⁄4
79
79
92
92
103
121
⁄
1⁄2
5⁄8
5⁄8
5
⁄8
5⁄8
3
11⁄4”
2”
11⁄2”
0102030 4050 60708090
100
gpm
0 38 76 114 152190 228266304342380
lpm
Flow
A2
G
F* (Max)
C (Max)
67⁄16
61⁄2
73⁄8
103⁄4
103⁄4
115⁄16
13
13
16
16
16
16
D
A, A1
B, B1, B2
DIMENSIONS
B
in.
mm
DIMENSIONS
ET
in.
mm
12
1”
⁄4”
12
A - LF25AUB-Z3
A1 - LF25AUB-S-Z3
A2 - LF25AUB-DU-LF-Z3
B - LF25AUB-DU-Z3
B1 - LF25AUB-S-DU-Z3
B2 - LF25AUB-DU-THDxPEX-Z3
ET - NPT Engagement for tight joint
ES - Female sweat socket depth
EP - PEX end connection
FQC - Quick-Connect union
FQC
A
B1
164
165
187
273
273
287
B2
C
in.
mm
in.
mm
in.
mm
63⁄8
67⁄8
713⁄16
11
113⁄16
1211⁄16
162
175
198
279
284
322
–
63⁄4
711⁄16
–
–
–
–
171
195
–
–
–
7
7
8
9
91⁄2
111⁄4
178
178
203
229
241
286
WEIGHT
ES
EP
FQC
in.
mm
in.
mm
in.
mm
lbs.
kgs.
⁄
3⁄4
15⁄16
1
11⁄16
15⁄16
13
19
23
25
28
34
–
5⁄8
13⁄16
–
–
–
–
16
21
–
–
–
11⁄2
111⁄16
13⁄4
–
–
–
38
42
45
–
–
–
3.5
3.5
6.5
10
10
15
1.6
1.6
3.0
4.5
4.5
6.8
12
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
ES-LF25AUB 1734
© 2017 Watts
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