Checking the Thermostat
If cold seat #13 on thermostat is worn or deeply indented,
remove it and replace with a new one. If there is a question
as to the thermostat being good, hold thermostat under
cold water faucet and insert an eraser capped pencil into
the center of thermostat. Make a reference mark where
pencil protrudes from the thermostat. Now place the entire
thermostat into hot water, approximately 125°F, for about
one minute. Remove thermostat from water, examine the
reference mark on pencil again. At this temperature, it
should extend out from former position about 1/8”. If it does
not, a new thermostat should be installed.
CAUTION: Extreme care should be exercised when
placing thermostat in and out of hot water.
Checking Piston and Liner
Remove piston assembly #15 from valve. Check the piston
assembly and liner #21 for cleanliness and excessive wear.
Check hot disc #17 for wear. Replace all worn parts.
Note:
Liner #21can be removed with a:
9/32” hex wrench for low flow 1/2” valves, 3/8” hex wrench for
med & high flow 1/2” valves, 5/8” hex wrench for 3/4” valves.
Before reassembling the valve, thoroughly flush out with water.
Note:
Piston Sub Assembly, consisting of parts #’s 16, 17,
18, 19 and 20, is factory pre-set with Liner #21, as a single
unit.
Use only genuine factory parts for replacement of seat
washers; thickness will affect the operation of the mixing
valve.
When in Need of Information
When writing the factory or one of its representatives
in regard to a mixing valve, be sure to give the number
appearing on the name plate fastened to the dome.
Repair Kit
Valves can be completely rebuilt in a matter of minutes
without removal from the line by installing a repair kit.
WARNING: This product contains chemicals known
to the State of California to cause cancer and birth
defects or other reproductive harm.
(Installer: California law requires that this warning
be given to the consumer.)
For more information: www.oehha.org/prop65
Thermostatic Shower Valve Cut-away
6
9
26
10
5
8
12
15
25
19
17
16
20
22
14
21
18
11
27
3
2
13
Recesso cutaway
Item
Description
Contains
Part No.
A
Complete Repair Kit
11-12-15-18-21+B
79850-00
B
O-Ring & Gasket Kit
6-10-13-14-17-22-23-24-27 79959-00
C
Piston & Liner Assembly
14-15-21
72014-11
E
Cover & Spindle Assembly
See page 4
F
Thermostat Assembly
10-11
71870-11
H
Dialplate Assembly
See page 4
Must specify capacity and finish of valve. Parts shown under 1/2” are for 1-5 GPM.
All parts shown are for Plain Bronze finish.
Repair Kits and Assemblies
