Sizing and placement, Dimensions - weight, Notice – Watts LF15M2 User Manual
Page 2
Sizing and Placement
Rule 1 covers multiple fixture branch lines which do not
exceed 20 ft. (6m) in length.
Explanation - Fixture-unit sizing and selection table is used
to select the required PDI unit (water hammer arrestor).
Rule 2 covers multiple fixture branch lines which do exceed
20 ft. (6m) in length.
Explanation - Fixture-unit sizing and selection table is used
to select the required PDI unit (water hammer arrestor). The
sum of the fixture units rating of units X and Y shall be equal
to or greater than the demand of the branches.
X
Up to 20 ft. (6m)
Y
X
Over 20 ft. (6m)
Rule 1
Rule 2
Riser
Typical Branch Line
No. LF15M2/LF15M2S
Water Hammer Arrestor
As shown, it has been established that the preferred location
for the water hammer arrestor is at the end of the branch line
between the last two fixtures served.
The location of the water hammer arrestor shown above applies
to branch lines that do not exceed 20 ft. (6m) in length, from the
start of the horizontal branch line to the last fixture supply on
this branch line. When the branch line exceeds the 20 ft. (6m)
length, an additional water hammer arrestor should be used.
This practice is best defined by two rules which have been
established to cover the placement of water hammer arrestors.
Sizing and Selection Table
Size
(DN)
MODeL
ORDeR
CODe
MODeL
ORDeR
CODe
CROSS
FiXTURe
UNiTS
ReF. PDi
STANDARD
in. mm
Threaded
Solder
1
⁄
2
" 15
LF15M2-A 0750160 LF15M2-AS 0750150
1-11
A
3
⁄
4
" 20
LF15M2-B 0750161 LF15M2-BS 0750151
12-32
B
1" 25
LF15M2-C 0750162 LF15M2-CS 0750152
33-60
C
1" 25
LF15M2-D 0750163 LF15M2-DS 0750153
61-113
D
1" 25
LF15M2-E 0750164 LF15M2-ES 0750154 114-154
E
1" 25
LF15M2-F 0750165 LF15M2-FS 0750155 155-330
F
Dimensions - Weight
Size (DN)
B
DiMeNSiONS
WeighT
A
B
in.
mm
in.
mm
(lbs)
(kgs)
Threaded
1
⁄
2
" LF15M2-A
1
1
⁄
8
28.5
5
15
⁄
16
150.9
0.5
0.2
3
⁄
4
" LF15M2-B
1
3
⁄
8
34.9
8
9
⁄
16
218.0
0.9
0.4
1" LF15M2-C
1
5
⁄
8
41.3
8
13
⁄
16
223.5
1.3
0.6
1" LF15M2-D
2
1
⁄
8
54.0
9
15
⁄
16
252.5
2.0
0.9
1" LF15M2-E
2
1
⁄
8
54.0
12
11
⁄
16
322.5
2.3
1.1
1" LF15M2-F
2
5
⁄
8
66.7
11
5
⁄
32
283.5
2.7
1.2
Solder
1
⁄
2
" LF15M2-AS
1
1
⁄
8
28.5
8
1
⁄
4
210.0
0.44
0.2
3
⁄
4
" LF15M2-BS
1
1
⁄
8
28.5
10
254.0
0.54
0.2
1" LF15M2-CS
1
3
⁄
8
34.9
12
1
⁄
2
317.5
0.92
0.4
1" LF15M2-DS
2
1
⁄
8
54.0
11
280.0
1.63
0.7
1" LF15M2-ES
2
1
⁄
8
54.0
13
1
⁄
2
343.0
1.98
0.9
1" LF15M2-FS
2
1
⁄
8
54.0
16
406.5
2.32
1.1
B
A
Fixture Units Sizing Information
FiXTURe UNiTS
TYPe OF SUPPLY
PUBLiC
PRiVATe
FiXTURe
CONTROL
TOTAL C.W. h.W. TOTAL C.W. h.W.
Water Closet 1.66 PF
Flush Valve
8
8 –
5
5
–
Water Closet 1.66 PF
Flush Tank
5
5 –
2.5 2.5 –
Pedestal Urinal 1.06 PF
Flush Valve
4
4 –
–
–
–
Stall or Wall Urinal
Flush Valve 1.06 PF 4
4 –
–
–
–
Stall or Wall Urinal
Flush Tank 1.06 PF 2
2 –
–
–
–
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
Flush Valve Closet –
– –
8
8
3
Bathroom Group
Flush Tank Closet –
– –
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
ES-LF15M2 1329
© 2013 Watts
USA: Tel: (978) 688-1811 • Fax: (978) 794-1848 • www.watts.com
Canada: Tel: (905) 332-4090 • Fax: (905) 332-7068 • www.watts.ca
A Watts Water Technologies Company
The information contained herein is not intended to replace the
full product installation and safety information available or the
experience of a trained product installer. You are required to
thoroughly read all installation instructions and product safety
information before beginning the installation of this product.
NOTICE