temperedwater.com
5330 East 25th St.
Indianapolis, IN 46218
Phone (317) 261-1212
Fax (317) 261-1208
INSTALLATION &
MAINTENANCE MANUAL
Design and specifications subject to change without notice.
Please refer to
temperedwater.com
to ensure most
current data sheet and other design solutions.
CAUTION: When maintaining and adjusting the
mixing valve, all fixtures should be isolated from
use. Lawler Manufacturing Co., Inc. recommends
that you work safely at all times and in a manner
consistent with the OSHA Lock/Tagout standard,
29 CFR 1910.147 and other applicable standards.
temperedwater.com/patents
M 66 E
ASSE 1017 Approved
ASSE Lead Free Certified
Certified to CSA B125.3
NOTICE!
No mixing valve will work satisfactorily if improperly installed. We suggest, therefore, that you read
these instructions carefully before installing and follow directions as outlined. Handle the mixing valve with care.
Series 66
Thermostatic Water
Controller
This installation & maintenance manual covers all
configurations of the Series 66.
DIMENSIONS
Valve Number
A N.P.T.
B N.P.T.
C
66-25
3/4” 3/4” 10”
66-50
3/4” 1” 10”
66-80
1” 1-1/4” 11”
66-125*
1-1/4” 1-1/2” 12-3/4”
66-150*
1-1/2” 2” 13-1/4”
66-200*
2” 2” 15”
Dimensions are for reference purposes only. For rough-in dimensions
please refer to Lawler’s Revit/BIM models found at temperedwater.com.
*66-125, 66-150 and 66-200 are not lead free certified
71762_66.pdf
B
A
A
C
CAPACITIES – GPM SERIES 66
Pressure Drop PSI
5
10
20
30
45
60
Min.
Flow
GPM
Valve Number
Capacity – GPM
66-25
9 12 17 21 25 28 4
66-50
18 25 34 41 50 57 8
66-80
28
39
54
66
80
91
12
66-125*
43
60
85
103
125
144
19
66-150*
52 72 100 124 150 174 23
66-200*
64
96
133
165
200
230
30
1/2 gpm when properly installed in recirculated system.
CAPACITIES – LPM SERIES 66
Pressure Drop PSI
5
10
20
30
45
60
Min.
Flow
LPM
Valve Number
Capacity – LPM
66-25
34
45
64
79
94
106
15
66-50
68
95
129
155
189
216
30
66-80
106
148
204
250
303
344
45
66-125*
163
227
322
390
473
545
72
66-150*
197
273
379
469
568
659
87
66-200*
242
363
503
625
757
871
114
*66-125, 66-150 and 66-200 are not lead free certified
