Submittal Sheet

Page 2 of 2
Rated Flow (established by approval agencies)
Flow Characteristics
Zurn Industries, LLC | Wilkins
1747 Commerce Way, Paso Robles, CA U.S.A. 93446 Ph. 855-663-9876, Fax [phone]
In Canada | Zurn Industries Limited
7900 Goreway Drive, Unit 10, Brampton, Ontario L6T 5W6, 877-892-5216
www.zurn.com
0
69
138
207
0.0 63.1 126.2 189.3 252.4
0
10
20
30
0 1000 2000 3000 4000
PRESSURE LOSS (kPa)
FLOW RATES (l/s)
PRESSURE LOSS (PSIG)
FLOW RATE (GPM)
MODEL 375AST 6", 8" & 10" (STANDARD AND METRIC)
0
35
69
104
138
0.0 12.6 25.2 37.9 50.5
0
5
10
15
20
0 200 400 600 800
PRESSURE LOSS (kPa)
FLOW RATES (l/s)
PRESSURE LOSS (PSIG)
FLOW RATES (GPM)
MODEL 375AST 2 1/2", 3" & 4" (STANDARD & METRIC)
Typical Installation
Local codes shall govern installation requirements. Unless
otherwise specified, the assembly shall be mounted at a
minimum of 12" (305mm) and a maximum of 30" (762mm)
above adequate drains with sufficient side clearance for test-
ing and maintenance. The installation shall be made so that
no part of the unit can be submerged.
Specications
The Reduced Pressure Principle Backflow Prevention Assembly shall be certified to NSF/ANSI/CAN 61, ASSE® Listed 1013,
and supplied with full port gate valves. The main body and access cover shall be 304L Stainless Steel, the seat ring and check
valve shall be NORYL™, the stem shall be stainless steel (ASTM A 276) and the seat disc elastomers shall be EPDM. The
checks and the relief valve shall be accessible for maintenance without removing the device from the line. The Reduced Pres-
sure Principle Backflow Prevention Assembly shall be a ZURN WILKINS Model 375AST.
Capacity thru Schedule 40 Pipe (GPM)
Pipe size 5 ft/sec 7.5 ft/sec 10 ft/sec 15 ft/sec
2 1/2" 75 112 149 224
3" 115 173 230 346
4" 198 298 397 595
6" 450 675 900 1351
8" 780 1169 1559 2339
10" 1229 1843 2458 3687
12" 1763 2644 3525 5288
6" (150mm)
3" (80mm)
2 1/2" (65mm)
ZURN WILKINS MODEL 375ASTOSYFSC
OUTDOOR HORIZONTAL INSTALLATION
DIRECTION OF FLOW
PROTECTIVE
ENCLOSURE
12” MIN.
30” MAX.
8" (200mm)
10" (250mm)
4" (100mm)
12” MIN
30” MIN
ZCSM-PF CONNECTED
PRESSURE MONITOR
ZCSM-BTM
CONNECTED
FLOW METER
DIRECTION OF FLOW
INDOOR INSTALLATION
(375AST with ZCSM-PF Connected Pressure Monitor
and ZCSM-BTM Connected Flow Meter accessories)