Model 1260XL

Water Hammer Arrester

Application
Ideal for use where Lead-Free* fittings are required.
Designed to protect residential, commercial and
industrial water lines during pressure surges following
quick valve closure. This excessive pressure surge is
absorbed by the pre-charged cushion of air perma-
nently sealed within the water hammer arrester. The
water hammer arrester may be installed within a stud
bay without the need for an access panel.

Standards Compliance
• PDI® Certified WH-201
• ASSE® Listed 1010
• ANSI A112.26.1
• UPC® Listed
• Meets the requirements of NSF/ANSI/CAN 372*
*(0.25% MAX. WEIGHTED AVERAGE LEAD CONTENT) LEAD-FREE

Materials
Body Copper Tube (seamless, Type “L”)
Tailpiece C69300 Low Lead Brass
Piston Polycarbonate (Sizes A and B), PVC Pressure
(Sizes C-F) Maximum transient pressure surge, with arrester prop-
O-rings EPDM erly sized and placed in the water supply system, will
Solder Lead Free not rise above 150 psi following quick valve closure.
Lubricant Dow-Corning Silicone Compound #111 Maximum static pressure: 250 psi. For best perfor-
mance, static line pressure should not exceed 80 psi;
contact the factory for proper sizing if static pressure
is greater. Max spike pressure 400 psi.
Features Nitrogen preload 60 PSI.
Sizes: A, B , C, D, E, F
Temperature range 32°F to 212°F
End connections Threaded ANSI/ASME B1.20.1 B B

Dimensions & Weights (do not include pkg.)

DIMENSIONS
MNPT (approximate) FIXTURE PIPE
PDI
MODEL THREAD UNIT SIZE
SIZE A B
CAPACITY in.
in. mm in. mm in. mm
1260XL-A A 1/2 15 6 1/4 159 7/8 22 1 - 11 1/2 A A
1260XL-B B 3/4 20 7 1/4 184 7/8 22 12 - 32 3/4
1260XL-C C 1 25 9 1/4 235 1 1/8 28.6 33 - 60 1
1260XL-D D 1 25 9 1/2 241 1 3/4 44 61 - 113 1 1/4
1260XL-E E 1 25 11 1/4 286 2 1/2 64 114 -154 1 1/2
1260XL-F F 1 25 12 305 2 7/8 73 155 - 330 2
A, B, C D, E, F

Specifications
The Water Hammer Arrester shall be certified to NSF/ANSI 372, consist of a copper body with a low lead brass hex-
agonal male pipe threaded inlet, polycarbonate or PVC piston, EPDM o-rings and lead free solder. The device shall
be pre-charged and sealed at the factory. The Water Hammer Arrester shall be a ZURN WILKINS Model 1260XL.

Zurn Water, LLC | Wilkins Rev. P

1747 Commerce Way, Paso Robles, CA U.S.A. 93446 Ph. 855-663-9876, Fax 805-238-5766 Date: 6/24
In Canada | Zurn Industries Limited Document No. WHA-1260XL
7900 Goreway Drive, Unit 10, Brampton, Ontario L6T 5W6, 877-892-5216 Product No. Model 1260XL
www.zurn.com Page 1 of 2
 Sizing & Placing Data
Fixture Units Sizing Information The values shown in the Fixture Units Sizing Informa-
TYPES OF FIXTURE-UNITS tion table represent the standard ratings used by en-
FIXTURE SUPPLY PUBLIC PRIVATE gineers to size water distribution systems and are also
CONTROL Total C.W H.W Total C.W H.W used to size water hammer arresters. Match total fix-
Water Closet Flush Valve 8 8 N/A 5 5 N/A
ture units to correct model of water hammer arresters
required from Table I. All sizing data in this brochure
Water Closet Flush Tank 5 5 N/A 3 2 1/2 N/A
are based on flow velocities of 10 F.P.S. or less. The
Pedestal Urinal Flush Valve 4 4 N/A N/A N/A N/A sizing method was designed with a maximum velocity
Stall or Wall Urinal Flush Valve 4 4 N/A N/A N/A N/A of 10 F.P.S. to offer assurance that the Water Hammer
Stall or Wall Urinal Flush Tank 3 3 N/A N/A N/A N/A
Arrester is capable of handling shock of maximum
intensity that may be encountered.
Lavatory Faucet 2 1 1/2 1 1/2 1 1 1
HW
Bathtub Faucet 4 2 3 2 1 1/2 1 1/2
CW
Shower Head Mixing Valve 4 2 3 2 1 2 Fig. 1 - PUBLIC
EXAMPLE - Fig 1
Bathroom Group Flush Valve Closet N/A N/A N/A 8 8 3 C.W. =22 Fixture Units
Bathroom Group Flush Tank Closet N/A N/A N/A 6 6 3 Needs -1260XL-B "A" "B"

Separate Shower Mixing Valve N/A N/A N/A 2 1 2 H.W. =6 Fixture Units
Service Sink Faucet 3 3 3 N/A N/A N/A Needs -1260XL-A
Laundry Tubs (1-3) Faucet N/A N/A N/A 3 3 3 LAVATORY
(FAUCET)
Combination Fixture Faucet N/A N/A N/A 3 3 3 WATER CLOSET
(FLUSH VALVE)

Multi-Fixture Branch Lines

Rule 1 - Branch lines of 20 feet or less. Fig. 2
Water Hammer Arrester should be placed at the end of RISER
WATER HAMMER ARRESTER
the branch line between the last two fixtures served, as
shown at right. Select required model using fixture unit TYPICAL BRANCH LINE

sizing.

UP TO 20'

Rule 2 - Branch lines exceeding 20 feet.

Fig. 3
An additional Water Hammer Arrester should be placed
as shown at right. Select required models using fixture OVER 20'
unit sizing. The sum of the fixture unit ratings of units X
Y X
and Y shall be equal to or greater than the demand of
the branches.

Long Runs Of Piping To Remote Equipment

Sizes for Long Runs of Piping
FOR FLOW PRESSURES UP 80 PSIG When long runs of piping are employed to serve a
remote item of equipment, the Water Hammer Arrester
Nominal Pipe Diameter
LENGTH should be located as close as possible to the point of
1/2" 3/4" 1" 1 1/4" 1 1/2" 2"
OF PIPE quick closure (see Fig. 4).
* ** * ** * ** * ** * ** * ** The size and quantity of Water Hammer Arrester to be
25' A B A B B C C D D E E F installed in branch lines is shown in Table III. Ideally, the
50' A B B C C D D E E F F CF flow pressure in branch lines serving fixtures should
75' B C C D D E AE F F CF EF FF
never exceed 55 PSIG. Pressure reducing valves should
be installed to maintain proper pressure. When, how-
100' C D D E E F F CF CF EF FF EFF
ever, flow pressures of 65 to 80 PSIG are used, the next
125' C D D E E CF AF DF EF FF EFF BFFF larger size Water Hammer Arrester should be selected
150' D E E F F CF DF FF FF DFF FFF FFFF (see table Sizes for Long Runs of Piping).
* Flow Pressures up to 65 psig
**Flow Pressures over 65 psig and up to 80 psig

WATER HAMMER ARRESTER QUICK CLOSURE VALVE

LONG RUN OF PIPING

SHOCK
Fig. 4 OUTLET

Zurn Water, LLC | Wilkins

1747 Commerce Way, Paso Robles, CA U.S.A. 93446 Ph. 855-663-9876, Fax 805-238-5766
In Canada | Zurn Industries Limited
7900 Goreway Drive, Unit 10, Brampton, Ontario L6T 5W6, 877-892-5216
www.zurn.com Page 2 of 2