INSTALLATION INSTRUCTIONS
Two-Handle Thermostatic Wall Valve
With Integral Volume Control
Product Number: J-THVC12
Please read instructions carefully before beginning the installation.
INSTALLER WARNING
1 › Follow all applicable Local Plumbing Codes, Public Health and Safety Codes.
2 › This unit has no serviceable filter. See Valve Maintenance Section.
3 › Before installation, flush all pipes thoroughly.
.
JACLO.COM
THERMOSTATIC WALL VALVE | PG 1
REVISED JULY ‘08
j a c l o i n d u s t r i e s | 129 Dermody Street Cranford, NJ 07016
p 908.653.4433 | 800.852.3906 f 908.653.1717 | 800.852.4133
Thermostatic Valve Flush Tube Set
30
29
0-1050-29
JACLO.COM
THERMOSTATIC WALL VALVE | PG 2
ITEM
1
2
3
4
5
6
7
8
9
10
11H
11C
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
QUANTITY
1
1
1
1
2
1
1
1
1
1
1
1
2
2
2
2
2
2
1
1
1
1
1
2
1
1
1
1
~
1
1
DESCRIPTION
Dual Therm. Valve Body
1/2" Therm Valve Replacement Cartridge
Therm. Valve Cartridge Lock Nut
Therm. Valve Limit Stop Ring
Stainless Steel Limit Stop
Spline Adapter
Temperature Dial
Dial Pointer
Dial Sleeve
Gasket Set for Dual Therm.
Hot Check Stop Body
Cold Check Stop Body
Therm. Valve Check Stop Lock Nut
Check Stop O-Ring
Check Stop Seal
Check Stop Spring Washer
Check Stop Spring
Check Stop Seat
Traditional Two Hole Plate
Hot Replacement Cartridge
Gasket for Traditional Plate
Extra Long Screw with Washer
Volume Control Tube Gasket
Handles
O-Ring
Volume Control Cover Tube
Stem Broach for J-THVC12
Screw for the 0-VB-EXT-13
Set Screw (Lever Handle Only)
Therm. Valve Rough in Shield
M4 x .7 x 10mm Long Screw
PART #
J-THVC12-BODY
J-TH12-CART
0-1050-3
0-2050-4
0-1050-5
1050-6-**
0-1050-7
0-1050-8
J-1050-9
0-6000-GASKET
0-1050-11-C-SUB
0-1050-11-H-SUB
0-1050-12
0-1050-13
0-1050-14
0-1050-15
0-1050-16
0-1050-17
J-6000-PLATE
0-VB-1001-H
0-1050-10
0-30820-**
****
****
****
J-6000-12
0-VB-EXT-13
0-1001-6-NYL
0-30825-5
0-1050-20
0-30776
SYSTEM REQUIREMENTS
This thermostatic valve is designed for use with pressurized hot & cold water supplies only and should not be used
with low-pressure storage heating systems.
This valve was factory set to 100°F maximum at a pressure of 45 PSI. The actual temperature must be checked
due to waterINSTALLER
temperatureWARNING
& pressure deviations.
This thermostatic valve has a built-in volume control. For multiple outlets JACLO recommends use of our 20682
3 function diverter valve
Pressure
Recommended range-
30PSI - 70 PSI
Temperature
Hot water inlet-
165°F Max.
Marked dial range-
70°F - 120°F
Safety stop-
Adjustable
› ›
›
JACLO.COM
THERMOSTATIC WALL VALVE | PG 3
Valve 1/2” Female pipe inlets and outelts
ROUGH INSTALLATION
1 › Make sure hot and cold water is piped to the correct valves inlets.
2 › Do Not Solder Connections unless valve is kept cool and heat is no closer than 3" to body. Otherwise
remove check stops and cartridge. (See check stop removal section).
3 › Postion valve so the finished wall falls between min./max. thickness mark on the rough-in shield.
Caution: Valve can accommodate walls up to 1" thick. For walls up to 2" thick order a DUAL THERM_
EXT Kit (See Page 2).
4 › A twin elbow is required for tub/shower installations (see below). For shower only installations the twin
elbow is not required. (See below).
5 › Install tub spout.
6 › Remove rough-in shield & tag (see Fig. 2, Page 5).
7 › Before pressurizing system for testing, make sure that both check stops are in the open position and
the volume control is in the closed position.
8 › Once system is pressurized turn on water by opening volume control valve. Check for leaks. To adjust
temperature, see section on limit stop and temperature setting.
JACLO.COM
THERMOSTATIC WALL VALVE | PG 4
LIMIT STOP & TEMPERATURE SETTING
1 › Make sure stop ring notch and cartridge
notch are aligned with line on spindle spline
(see Fig. 2A). Close volume control. Make
sure hot & cold check valve/stops are open
by rotating until the open arrows point to
the center of the valve. (See Fig. 2). Screw
sleeve (9) onto valve body until it bottoms
tight on plastic stop ring.
2 › Open volume control
3 › Valve is set to 100°F max. Pressure
and temperatures vary. Check 100°F
setting with thermometer.
TO RE-ADJUST TEMPERATURE SEE BELOW
1 › To reset hot water temperature: Remove both limit stops. Open volume control valve & run water for 5 minutes. Using
a thermometer in the water flow, rotate cartridge spindle counter-clockwise to the highest temperature desired
(110°F max. Recommended to avoid scalding) and let it stabilize.
2 › Carefully replace the hot limit stop (without rotating the spindle), such that stop’s bent leg is resting against the stop ring
shoulder (Fig.3)
3 › Rotate the spindle clockwise gently, until the water becomes cold and spindle stops rotating. Do not force spindle
past that position!
4 › Replace cold limit stop (without rotating the spindle), such that stop’s bent leg is resting against the stop ring
shoulder (see Fig. 4)
JACLO.COM
THERMOSTATIC WALL VALVE | PG 5
DIAL POINTER, TRIM & HANDLE INSTALLATION
1 › Rotate the spindle until the temperature of water stabilizes at 100°F.
2 › Push the dial pointer (8) into sleeve (9), with the arrow up in the 12 o’clock position (Fig.6). Install dial assembly (6) over
the spindle until it bottoms (without rotating it), aligning the 100°F marking to the arrow of the insert (8).
3 › Place the self adhesive backed foam strip (24) onto the inside surface of the traditional front plate (18) only.
Position the opening in the down position to prevent water infiltration. Slide front plate (18) or (19) gently over sleeve (9)
until firmly seated against wall. Place a bead of silicone around the outer edge of front plate to secure it in position and
fill any gaps.
4 › Install handle and secure with setscrew (see Fig.7). Do not overtighten.
NOTE: If valve is installed too deep, order extension kit DUAL THERM-EXT to extend handle height & sleeve by 1". (See Page 2).
JACLO.COM
THERMOSTATIC WALL VALVE | PG 6
TROUBLE SHOOTING GUIDE
PROBLEM
Water leaks from
shower head / tub
spout when the
volume control is
shut off.
Water is hot or cold
but not mixing.
Can not adjust
water temperature
properly.
POSSIBLE CAUSE
SOLUTION
The shower head is trapping
water behind the faceplate.
Remove shower head and clean out the holes in the faceplate.
Reinstall shower head.
The volume control valve has
been installed incorrectly.
Arrow on side of volume control should be pointing away from
the thermostatic valve. If arrow can not be seen, remove trim
and cartridge. Look into the valve cavity. The location of the
larger hole indicates the outlet of the volume control valve,
the volume control is installed incorrectly. Refer to installation
sheets for proper installation.
The ceramic disc in the cartridge
of the volume control valve has
been damaged.
Replace with a new cartridge
Thermostatic valve is installed
upside down or the supply lines
to the thermostatic valve are
reversed.
Refer to installation sheets for proper
installation.
Check valves / stops are not opened
all the way.
Remove trim and make sure the arrows on the check valve /
stops are facing toward the center of the
thermostatic valve.
Thermostatic cartridge is damaged.
If cartridge spindle rotates more than 270°
(DO NOT FORCE), replace cartridge.
Debris in screens of thermostatic
cartridge.
Remove thermostatic cartridge and clean screens.
Limit stops are not set properly.
Refer to installation instruction for setting limit stops.
Dial assembly is not calibrated.
Set water temperature with a thermometer and adjust dial
assembly to reflect the measured temperature.
Refer to installation sheet.
Check valve (s) / stops are not
opened all the way.
Install with new check valve (s) / stop (s).
Refer to check valves / stops removal and installation
section of the installation sheets.
Check valve (s) / stops have been
damaged.
Install new check valves / stops. Refer to check valves / stops
removal and installation section of the installations sheets
Debris in screens of thermostatic
cartridge.
Remove thermostatic cartridge and clean screens.
Check valves / stops are not opened
all the way.
Remove trim and make sure the arrows on the check valve /
stops are facing toward the center of the thermostatic valve.
Cold water in nearby
faucet is lukewarm.
Check valve (s) / stops have been
damaged or filled with debris.
Install new check valves / stops. Refer to check valves / stops
removal and installation section of the installations sheets
Thermostatic valve is
working properly, but
the water is not hot
enough, but water in
nearby faucet is hot
enough.
Limit stops are not set properly.
Refer to installation instruction for setting limit stops.
Boiler temperature not set high
enough.
Thermostatic valve has cold water mixing with the hot water at
all times, so the water temperature on the boiler will need to
be increased to get the desired temperature.
CAUTION: increasing the temperature will affect all plumbing
throughout the system.
Low flow of mixed
water.
JACLO.COM
THERMOSTATIC WALL VALVE | PG 7
Valve maintenance
› CAUTION: DO NOT ATTEMPT TO SERVICE THE THERMOSTATIC VALVE UNLESS VOLUME CONTROL
VALVES ARE SHUT OFF. OTHERWISE SERIOUS CHECK VALVE / STOP DAMAGE WILL OCCUR.
THERMO CARTRIDGE REMOVAL & INSTALLATION
Refer to Fig. 1, Page 2
1 › First - Shut off the volume control valve (s). (See pg. 4)
2 › Second - Shut off the check valve / stops by rotating each one half a turn (180°), until the OFF arrows
point in the direction of the water flow (toward the center of the valve). (See Fig.2 Page 5).
3 › Open a lower volume control valve slightly to relieve system pressure and drain.
4 › Remove handle, dial assembly, limit stops, front plate sleeve with insert and the stop rings.
5 › Remove cartridge locknut and pull cartridge out. Rotate slightly to aid removal. Flush any debris from
screen.
6 › To re-install cartridge, apply silicone grease to ‘O’ rings and insert in valve, rotating slightly. Orient
it with its notch up (12 o’clock position - see Fig.2 Page 5). Secure with locknut (3), using a 1-1/4"
wrench (do not overtighten).
7 › Slide plastic stop ring (4) over the cartridge such that stop ring’s notch is aligned to the notch on
cartridge (12 o’clock position - see Fig. 2 Page 5).
8 › Do not pressurize yet. Make sure the volume control valves are shut. This is a critical step to
eliminate damage to check stop seals.
9 › Open check stops and check for leaks. Volume control valves can now be open.
› CAUTION: The temperature limit stop (5) and dial (8) must be re-set - see limit stop and temperature
setting before replacing trim.
DIAL POINTER, TRIM & HANDLE INSTALLATION
1 › Shut off hot and cold water main supply valves. Remove handle, dial and front plate (18).
2 › Open a lower volume control valve slightly to relieve system pressure and drain.
3 › Unscrew the locknuts (12). Pull the check-stops (11) out while rotating slightly. Flush the cavities to
remove any debris.
4 › Check, clean and if necessary replace ‘O’ rings and/or the entire check stop. Grease lightly with
silicone valve grease. Make sure seat (17) moves freely.
5 › Insert check-stops (11) rotating while pushing and turn with OPEN arrows pointing in the direction of
the water flow (toward the center of valve). Stop will resist seating all the way in. This is normal.
6 › Screw locknuts (12) until they bottom seating check stops.
7 › Most important - Close the volume control valve (s). Restore hot and cold water and check for leaks.
› CAUTION: After performing any routine maintenance, the temperature limit stop and dial must be reset.
See limit stop and temperature setting (Page 5) & dial pointer (Page 6).
JACLO.COM
THERMOSTATIC WALL VALVE | PG 8
procedure to flush thermostatic valve
1 › Shut off water supply to valve.
2 › Remove stop nut and check valve/stop (hot & cold). Rotate to make removal easier.
3 › Screw in flushing adapters (hot & cold).
4 › Turn on water. Flush for 30 seconds to remove any debris from lines.
5 › Remove flush adapters (hot & cold).
6 › Reinstall check/valve stop (hot & cold) and stop nut. Rotate to make installation easier.
JACLO.COM
THERMOSTATIC WALL VALVE | PG 9
JACLO PRODUCT CARE
Thank you for selecting a JACLO product. In order to maintain the high quality finish of the product you have purchased,
please adhere to the following product care instructions:
Cleaning metal parts: For routine cleaning simply use a soft damp cloth and common household soap, then rinse
and dry. Proper care of your product is important because most water contains calcium that deposits on surfaces,
forming unpleasant spots. This can be avoided by routine cleaning and drying after every use. Use only mild soap based
detergents. Never use abrasive cleaners, bleach, disinfectants or cleaning products containing alcohol, ammonia,
hydrochloric or phosphoric acids as they will damage the product finish.
Cleaning rubber nibs: Some JACLO showerheads and handshowers are equipped with “Easy Clean” rubber nibs. Over
time calcium may build up in the nibs and diminish the performance of your shower product. Rubbing your fingers over
the nibs occasionally while operating your shower product will clear the calcium build up.
Please note: Your product warranty may not be valid if the above cleaning guidelines are not followed.
WARRANTY
Your new plumbing product is warranted by JACLO INDUSTRIES, 129 Dermody Street, Cranford, NJ 07016.
This warranty is extended to original consumer purchasers only. This warranty gives you specific legal rights, and
you may also have other rights which vary from state to state.
The product (including the finish on the product but excluding any installation hardware not supplied by JACLO)
is warranteed to be free from defects in material or workmanship under normal use and service for the lifetime of
the product, so long as the original consumer purchaser owns it. JACLO’s sole obligation under this or any other
warranty is limited to repairing or replacing, at JACLO’s option, any part or parts of the product which fail to conform
to such warranty. JACLO cannot warranty any living finish.
JACLO WILL NOT BE LIABLE FOR ANY CONSEQUENTIAL OR INCIDENTAL DAMAGES CAUSED BY A BREACH OF
THIS WARRANTY.
Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation
may
not apply to you.
In order to secure warranty performance, the original consumer purchaser must (a) have the product properly
with all installation instructions, (b) not subject the product to abuse, misuse or alter it in
installed
in accordance
any way, and (c) remove the product and return it to JACLO, transportation prepaid, together with a brief
description of the defect.
JACLO does not authorize any distributor, retailer or other person to modify this warranty or assume any liability
on its behalf with respect to it. Any questions regarding the operation of warranty should be addressed to JACLO,
Warranty Department.
Standard one year warranty applies to all commercial applications.
JACLO.COM
THERMOSTATIC WALL VALVE | PG 10