Dimensional Data (inches and [ mm ]) are Subject to Manufacturing Tolerances and Change Without Notice
Zurn Industries, LLC
|
Specification Drainage Operation
1801 Pittsburgh Avenue, Erie, PA U.S.A. 16502 · Ph. 855-663-9876, Fax 814-454-7929
In Canada
|
Zurn Industries Limited
3544 Nashua Drive, Mississauga, Ontario L4V 1L2 · Ph. 905-405-8272, Fax 905-405-1292
www.zurn.com
Z1700
INSTALLATION INSTRUCTIONS FOR
SHOKTROL WATER HAMMER ARRESTOR
Rev.
D
Date:
4/17/2018
C.N. No.
139910
Form #
WH1
Page 2 of 2
In an effort to arrive at a uniform method of sizing water hammer arrestors, members of the Plumbing and Drainage Institute
sponsored a comprehensive testing program which lasted four years. As a result, there is now an industry-wide standard,
P.D.I.-WH201 and the all-stainless-steel Zurn SHOKTROL conforms with every aspect of this newly-available information.
Standard P.D.I.-WH201 bases its sizing data upon the well-known fixture-unit formula. Since most engineers and specifiers
utilize fixture-units in their daily calculations, it was appropriate to employ this method for quick, concise water hammer
arrestor sizing.
Using Table II (below), determine the “weight in fixture-units” for cold and hot water branch lines serving a group of fixtures,
either for public or private installations. When the “weight in” has been established, the data is then applied to the selection
Table III.
Using the “weight in fixture-units” obtained from Table II, select the properly-sized SHOKTROL from Table III. If the water
pressure in the line exceeds 65 PSIG, select the next larger size SHOKTROL. If the fixture-unit contains “1/2” fraction,
“round it up” to the next larger or whole number. (Example: If total is 11-1/2 fixture units, change it to 12 fixture-units).
HOW TO PROPERLY LOCATE ZURN SHOKTROLS
Multiple Fixture-Branch Line Less Than 20’ Long-(Illus. 2). The
preferred location for a Zurn SHOKTROL is at the end of the branch line
between the last two fixtures served when the branch line does not
exceed 20’ in length, from the start of the horizontal branch line to the
last fixture supply on the line (Use Tables II & III Below).
Multiple Fixtures-Branch Line More Than 20’ Long-(Illus. 3). On
branch lines over 20’ in length, use two SHOKTROLS whose
capacities total the requirements of the branch. Locate one unit
between the last and next to last fixture and the other unit
approximately midway between the fixtures. (Use Tables II & III
Below).
Multiple Fixtures-Extremely Long Branch Line-(Illus. 4). In unusual
instances where a very long branch line is involved, the water supply
is generally fed to some midpoint or other location on the branch line.
(Use Tables II & III Below).
Illustration 2. Example of P.D.I. Rule 1
Illustration 3. Example of P.D.I. Rule 2
Illustration 4. Example of P.D.I. Rule 1 and Rule 2
Table II
Total C.W. H.W. Total C.W. H.W.
Water Closet
Flush Valve
10
10
-
6
6
-
Water Closet
Flush Tank
5
5
-
3
3
-
Pedestal Urinal
Flush Valve
10
10
-
-
-
-
Stall or Wall Urinal
Flush Valve
5
5
-
-
-
-
Stall or Wall Urinal
Flush Tank
3
3
-
-
-
-
Lavatory
Faucet
2
1-1/2 1-1/2
1
1
1
Bathtub
Faucet
4
2
3
2
1-1/2 1-1/2
Shower Head
Mixing Valve
4
2
3
2
1
2
Bathroom Group
Closet
Flush Valve
-
-
-
8
8
3
Bathroom Group
Closet
Flush Valve
-
-
-
6
6
3
Separate Shower
Mixing Valve
-
-
-
2
1
2
Service Sink
Faucet
3
3
3
-
-
-
Laundry Tubs (1-3)
Faucet
-
-
-
3
3
3
Combination Fixture Faucet
-
-
-
3
3
3
Weight in Fixture-Units
Public
Private
Fixture
Type of
Supply
Control
Table III
Zurn Shoktrol Size
Z1700 Series
#100
#200
#300
#400
#500
#600
P.D.I. Units
A
B
C
D
E
F
Fixture-Units
1-11
12-32
33-60
61-113
114-154
155-330
Cold Water Branch
2 WC at 10 F.U. . . . . ea. = 20
4 Lav. at 1° F.U. . . . . ea. = 6
Total 26
Hot Water Branch
4 Lav. at 1° F.U. . . . . ea. = 6
Total 26
Select Zurn #200 Unit
Select Zurn #100 Unit
Example 1
Example 2
Select Zurn #200 Unit
Cold Water Branch
2 WC at 10 F.U. . . . . ea. = 20
2 Urinal at 5 F.U. . . . ea. = 10
4 Lav. at 1° F.U. . . . . ea. = 6
Total 36
Hot Water Branch
4 Lav. at 1° F.U. . . . . ea. = 6
Total 26
Select Zurn #100 Unit
