Product Overview

For Residential, Commercial and Institutional Applications
ES-LF1170_LFL1170
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Hot Water Temperature Control
Valves
Sizes:
1
⁄2" – 1"
Series LF1170, LFL1170 Hot Water Temperature Control Valves are
specifically designed for mixing hot and cold water on hot water supply
systems. They can be used for a variety of applications to reduce the
temperature of the hot water from the system and are ideal for radi-
ant heat applications. This series features a “double throttling” design
which combines the control of the hot and cold water to provide a
sensitive response to changes in water temperature passing through
the mixing chamber.
The LF1170-M2 can be set to any temperature between 90°F and
160°F (60°F and 120°F for model LFL1170-M2) with flow rates as
low as 0.5 gpm and as high as 23 gpm (refer to capacity chart on the
back). The superior flow characteristics of this valve provide accurate
temperature control to the requirements of ASSE 1017** across the
rated flow range. The LF1170 and LFL1170 feature Lead Free* con-
struction to comply with Lead Free* installation requirements.
These valves also provide additional safety as they restrict mixed
water out to a drip upon loss of cold water supply to the valve.
As an added feature, the LF1170-M2 and LFL1170-M2 incorporate
integral check valves and filter washers in both the hot and cold water
inlets to protect against cross flow. Available with threaded (-UT),
solder (-US), PEX (-PEX), Quick-Connect (-QC) or CPVC (-CPVC)
connections.
Features
• LeadFree*castcoppersiliconalloybodyconstruction
• Solidwaxhydraulicprinciplethermostatassuresdependable
mixing of hot and cold water
• Thermostatcontrolsbothhotandcoldwater
• Modelsavailablewithsolder,thread,PEX, Quick-Connect
or CPVC end connections
• Integralfilterwashersandcheckvalves
• Adjustmentcapwithlockingfeature
• ASSE1017listed**andIAPMOUPC
LF1170-US-M2
Minimum flow requirements to maintain set temperature
for Series LF1170-M2
VALVE SIZE GPM
1
⁄2" – 1" .5
LF1170-QC-M2
* The wetted surface of this product contacted by consumable
water contains less than 0.25% of lead by weight.
**ASSE 1017 listing is for valves used in hot water source applications.
LEAD FREE
*
Series LF1170 and
LFL1170
Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements,
please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials with-
out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.
FAILURE TO COMPLY WITH PROPER INSTALLATION AND
MAINTENANCE INSTRUCTIONS COULD CONTRIBUTE TO
THE VALVE FAILURE.
This Hot Water Master Tempering Valves cannot be used for
tempering water temperature at fixtures. Severe bodily injury
(i.e., scalding or chilling) and/or death may result depending
upon system water pressure changes and/or supply water
temperature changes. ASSE standard 1016, 1069 or 1070
listed devices should be used at fixtures to prevent possible
injury.
These Hot Water Tempering Valves are designed to be installed at
or near the boiler or water heater. They are not designed to com-
pensate for system pressure fluctuations and should not be used
where ASSE standard 1016, 1069 or 1070 devices are required.
These valves should never be used to provide “anti-scald” or
“anti-chill” service.
The components of the system must be of materials with a con-
struction capable of withstanding the high limit output tempera-
tures of the water heating source.
WARNING
!
WARNING
!
Need for Periodic Inspection and Yearly Maintenance:
Periodic inspection and yearly maintenance by a licensed
contractor is required. Corrosive water conditions, inlet
temperatures over 200°F (93°C), and/or unauthorized adjust-
ments or repair could render the valve ineffective for service
intended. Regular checking and cleaning of the valve’s inter-
nal components and check stops helps assure maximum
life and proper product function. Frequency of cleaning and
inspection depends upon local water conditions.