FNW 11P, 10P User Manual
Figure 10P & 11P
Proof
PIPING PRODUCTS
WATER HAMMER ARRESTORS
FOR NON-POTABLE APPLICATIONS
Applications:
The FNW water hammer arrestors are engineered devices that
provide maintenance-free continuous protection systems against water
hammer. Water hammer is a hydraulic shock wave generated within
a water distribution system due to a sudden stop in water ow. If
allowed to exist for any length of time, water hammer can cause pipes
to rattle, is capable of bursting pipe, and damaging other components
within the system. When installed properly, there is an unobstructed
shock path to the arrestor that is absorbed by a piston driven and
isolated cushion of air.
Features:
• Max. Static (Working) Pressure: 150 PSI
• Max. Spike Pressure: 350 PSI
• Temperature: 33°F to 180°F (0.6°C to 82°C)
• End Connection: NPT (10P), CxC (11P)
• For Commercial and Residential Systems (non-potable)
• Designed for Vertical or Horizontal Installation (not to be installed in
the inverted position)
• Can be installed in systems without need for access panels*
* Always check local plumbing codes to determine if access panels
are required.
* Not to be used in conjunction with copper propress system
Standards:
• ASSE Standard 1010
• IAPMO Listed (cUPC)
Warranty:
Sizing / PDI Fixture Units*
FNW Size
1/2” A A 1 - 11
3/4” B B 12 - 32
1” C C 33 - 60
1-1/4” D D 61 - 113
1-1/2” E 114 - 154
2” F 155 - 330
* As outlined in The Plumbing and Drainage Institute standard
PDI-WH 201. See the FNW water hammer arrestor IOM for more
details.
PDI Size Code
10P 11P
PDI Fixture Units
10P = MALE NPT (1/2” to 2”)
11P = COPPER SWEAT (1/2”to 1-1/4”)
Low Lead Compliant: Referring to laws dening “Lead Free” as wetted surface
of pipe, ttings and xtures in potable water systems that have a weighted
average lead content ≤ 0.25% per the Safe Drinking Water Act (Sec. 1417)
amended 1-4-2011 as well as other state regulations.
IAPMO
Figure Number Matrix
FNW End Size
END TYPE
SIZE CODE
1/2 = 500
3/4 = 750
1 = 1000
1-1/4 = 1250
1-1/2 = 1500
2 = 2000
www.fnw.com
Figure 10P & 11P
PIPING PRODUCTS
WATER HAMMER ARRESTORS
FOR NON-POTABLE APPLICATIONS
Fig. 10P Fig. 11P
A
2
5
3
1
C
B
Standard Materials
Ref. No. Description Material Qty
1 Body Brass, JIS 3604 1
2 Cylinder Copper C12200 1
3 Piston PP+30% Fiber 1
5 O-ring EPDM 2
A
2
5
3
1
C
B
Dimensions (inches)
Size
1/2 4.75 1/2 - 14 0.63 4.96 0.625 0.72
3/4 5.37 3/4 - 14 0.65 5.57 0.875 0.80
1 6.70 1 - 11 1/2 0.74 6.85 1.125 0.98
1-1/4 8.20 1-1/4 - 11 1/2 0.88 8.30 1.375 1.10
1-1/2 9.40 1-1/2 - 11 1/2 0.94
2 9.40 2 - 11 1/2 0.94
Fig. 10P Fig. 11P
A B (NPT) C A B C
DOC: FNW10P-11P14 Ver. 2/2014
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The contents of this publication are presented for information purposes only, and while effort has been made to ensure their accuracy, they are not to be construed as
warranties or guarantees, expressed or implied, regarding the products or services described herein or their use or applicability. All sales are governed by our terms and
conditions, which are available on request. We reserve the right to modify or improve the designs or specications of our products at any time without notice. Always
verify that you have the most recent product specications or other documentation prior to the installation of these products.
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