Model ZW1070XL
Aqua-Gard® Thermostatic Mixing Valve
LEAD-FREE*
®
*This product contains a weighted average lead content less than 0.25% for wetted surfaces.
*Meets the requirements of NSF/ANSI 61-9
 Installation  Maintenance Instructions
2. The device can be installed in any position. Note: the inlet hot
supply is to be connected to the “H” side of the valve and the cold
supply side to the “C” side.
3. The valve is to be fitted to deliver mixed water to a single outlet.
H
C
H
XL
C
MIXED
MIXED
H
INDIVIDUAL USE
H
1. Flush the Hot and Cold delivery lines completely before installing the
device.
SENSOR FAUCET
XL
INSTALLATION INSTRUCTIONS
It is suggested that the device be installed to deliver water to the end user.
It is to be used for the final control of water temperature at plumbing fixtures
and appliances. This ASSE 1070 approved device is to be used for point of
use. It is designed to mix cold water and hot water from the water heater
to a safer temperature range of 95-115°F (35-46°C).
C
C
SINGLE USE
4. To set the temperature on the valve remove the protective green cap.
The cap can be removed by inserting a small blade screwdriver into the
slot at the base of the blue cap and lightly push up. Using an adjustablewrench or combination wrench, rotate the flats clockwise to lower
the temperature or counter-clockwise to increase the set temperature.
Read temperature with a thermometer.
PIPING INSTRUCTIONS
The device is designed to be installed at a single outlet. It may be used to supply individual outlets when there is sufficient supply pressure. It is suggested
to use ball valves on the Hot and Cold inlet supplies.
5. Verify the set temperature by running a plumbing fixture and reinstall
the protective plastic cap to the device. For bathroom operation set
the maximum temperature not to exceed 95-115°F (35-46°C).
CAUTION: Installation of water temperature control products must be performed by qualified, licensed personnel. The qualified installer should be
sure that the proper device has been selected for the proper installation. A
faulty installation can cause scalding, severe injury or death.
PERFORMANCE
Outlet Temp. Range
Temperature Hot Supply
Temperature Cold Supply
Set Temperature Accuracy
Max. Working Pressure (inlet)
Temperature must be field set
Max. Working Pressure (Dynamic)
Flow rate @ 45 psi pressure loss
Min. Flow Rate
NOTICE: Annual inspection and maintenance is required of all
plumbing system components. To ensure proper performance and
maximum life, this product must be subject to regular inspection,
testing and cleaning.
95-115°F(35-46°C)
120-195°F max.
(49-90.5°C)
40-75°F (4.4-23.8°C)
+/- 3°F(1.78°C)
145 psi
1.5-70 psi
10 gpm
0.35 gpm
WARNING! Water Temperatures in Excess of 122°F(50°C) Are Dangerous and Will Cause Scalding, Severe Injury or Death! This valve is Not
Factory preset. To deliver a safe mixed water temperature at the outlet, the
installer must use a thermometer at the outlet to verify the temperature.
Set the outlet temperature between 95°F and 115°F
DIMENSIONS (approximate)
WEIGHT
A
B
C
in.
mm
in.
mm
in.
mm lbs. kg
38-ZW1070XLCOMP 3/8" compression 5 11/16 145 3 19/32 91 5 51/64 147 2
1
12-ZW1070XL
1/2" FNPT
5 27/64 138 3 23/64 85
5 1/4 133 2
1
12-ZW1070XLC
1/2" CU Sweat
34-ZW1070XL
3/4" FNPT
5 1/2 140 3 29/64 88 5 7/16 138 2
1
34-ZW1070XLC
3/4" CU Sweat
34-ZW1070XLCPVC
3/4" CPVC
5 27/64 138 3 3/8
86 5 9/32 134 2
1
34-ZW1070XLPEX
3/4" Barb
5 35/64 141 3 1/2
89 5 35/64 141 2
1
34-ZW1070XLM
3/4" MNPT
6 7/32 158 4 13/64 107 6 61/64 177 2
1
1-ZW1070XLC
1" CU Sweat
5 15/32 139 3 7/16 87 5 9/64 141 2
1
MODEL
INLET & OUTLET
A
H
XL
C
MIX
B
C
WARRANTY: ZURN WILKINS Valves are guaranteed against defects of material or workmanship when used for the services recommended. If
in any recommended service, a defect develops due to material or workmanship, and the device is returned, freight prepaid, to ZURN WILKINS
within 12 months from date of purchase, it will be repaired or replaced free of charge. ZURN WILKINS’ liability shall be limited to our agreement
to repair or replace the valve only.
! WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
! ADVERTENCIA: Cáncer y daño reproductivo - www.P65Warnings.ca.gov
! AVERTISSEMENT: Cancer et néfastes sur la reproduction - www.P65Warnings.ca.gov
®
ZURN WILKINS
1747 Commerce Way, Paso Robles, CA 93446 Phone:855-663-9876 Fax:805-238-5766
www.zurn.com
Removing Cap
Temperature Adjustment
FLOW CHARACTERISTIC
PRESSURE LOSS (PSIG)
MAINTENANCE
SERVICING THE STRAINERS
The strainers on the inlet supplies can be serviced by loosening the union nuts, removing the valve from service and
clean the screens thoroughly with water after disassembly.
Where water quality is a concern it may be necessary to
install additional line strainers.
SERVICING THE CHECK VALVES
The check valves can be serviced by removing them from
the body. Flush the check valves thoroughly with water
removing debris from the seat and seat washers. Reinstall
the check valve by pushing them into the body flush to
the body, spring first. Make sure that the poppet and seat
washer is facing you.
OPERATION
The valve internals themself cannot be serviced. If the valve
fails it must be replaced. The function of the valve can be
checked by measuring the temperature of the water at the
outlet nearest to the valve. If the temperature is within +/4°F of the initial set temperature, the valve is functioning
correctly. If the temperature has changed by more than +/4°F it is likely due to a build up of debris in the stainers or a
change in the supply condition.
Low Lead Bronze, nickel plated
Low Lead Brass
Polysufone
Noryl GFN2
300 Series Stainless Steel
Nitrile Elastomer
Noryl GFN2
MODEL ZW1070XL (STANDARD & METRIC)
0.3
60
FLOW RATES (l/s)
0.63
1.3
414
0.95
40
276
20
138
0
0
5
10
FLOW RATES (GPM)
20
15
PRESSURE LOSS (kpa)
MATERIALS
Body
Internal brass Piston Guide Tube
Spring & Screen
Seals
Checks
TROUBLESHOOTING
PROBLEM
The desired mixed water temp. cannot be
obtained or valve is difficult to set
Mix. Temperature is unstable
Mix Temperature changing over time
Either full Hot or Cold water flowing
No flow from the valve outlet
Flow rate reduced or fluctuating
Mixed water temp. too Hot or Cold
Mixed water temp. does not change
when the temp. adjuster is moved
Hot water flows into the cold water system or vise versa
Valve is noisy
®
ISZW1070XL (REV. E 6/17)
CAUSE
Hot and cold supplies are reversed, valve
is full of debris or strainers are fouled
Strainers are fouled or fluctuating supply
pressure
Fluctuating supply pressures or strainers
are full
Valve is set incorrectly
Hot or Cold water supply failure or strainers
are fouled
Valve or inlet fitting fouled by debris
Valve has been tampered with, valve
incorrectly set, or inlet temperatures are
not within specified limits
Hot and Cold supplies are reversed
SOLUTION
Refit valve so H & C are correct, flush
valve with water and clean strainers
Clean strainers and Install PRV's on
H & C inlet supplies
Install PRV's and clean strainers
Adjust mix. Temperature to 95-115°F
Restore inlet supply & check mix.
Temperature and clean strainers
Check valve and inlet fittings for blockage
Re-adjust to required set temp. to ensure
inlet temperatures are within specified
limits
Refit the valve to correct Hot and Cold
Check valve is fouled
Clean strainers and remove debris
Water velocity is too high
Reduce water velocity
ZURN WILKINS
1747 Commerce Way, Paso Robles, CA 93446 Phone:855-663-9876 Fax:805-238-5766
www.zurn.com
2