Specification

Flow Characteristics
Page 2 of 2
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
FLOW RATES (GPM)
FALL OFF (PSIG)
0
5
10
15
02030
40
69
104
0.61.3
2.5
FALL OFF (kpa)
FLOW RATES (l/s)
MODEL 70XL 3/4" & 1" (STANDARD & METRIC)
35
20
138
10
1.9
3/4" (20mm)
1" (25mm)
5
15 25
35
0.30.9 1.
62
.2
Typical Installation
Local codes shall govern installation requirements. Unless otherwise specified, the assembly shall be mounted in accordance
with the manufacturer’s instructions and the latest edition of the Uniform Plumbing Code. The assembly shall be installed
with sufficient side clearance for testing and maintenance. The Model 70XL may be installed in any position. If installed in a
pit, vault or indoors, specify the “SC” sealed cage option. Multiple installations are recommended for wide demand variations
or where the desired pressure reduction is more than 4 to 1 (i.e.: 200 psi inlet reduced to 50 psi outlet). CAUTION: Anytime
a reducing valve is adjusted, a pressure gauge must be used downstream to verify correct pressure setting. Do not bottom
adjustment bolt on bell housing.
Typical Installation
Specications
The Pressure Reducing Valve shall be certified to NSF/ANSI 61, of the direct-acting type, and ASSE® 1003 Listed. The inte-
gral bypass check valve main body and bell housing shall be cast bronze (ASTM B 584). The pressure reducing valve shall be
of the balanced piston design and shall reduce pressure in both flow and no-flow conditions using an adjusting bolt. All internal
parts shall be corrosion resistant and included in a replaceable cartridge. The bronze bell housing shall be threaded to the
body and shall not require the use of ferrous screws. The Pressure Reducing Valve shall be a ZURN WILKINS Model 70XL.
DIRECTION OF FLOW
MODEL 975XL2
BACKFLOW
PREVENTER
MODEL SXL
STRAINER
WATER METER
HOSE BIBB
MODEL 70XL
REGULATOR
MODEL XT
EXPANSION
TANK
WATER HEATER
MODEL TP1100A
RELIEF VALVE
MODEL 850XL
BALL VALVE
"Flow curves are based on a
50 psi pressure differential"