Manual

For Residential, Commercial and Institutional Applications
ES-1170_L1170
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Series 1170 and L1170
Hot Water Temperature Control Valves
Sizes:
1
⁄2" – 1" (15 – 25mm)
Series 1170, L1170 Hot Water Temperature Control Valves are spe-
cifically 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 1170-M2 can be set to any temperature between 90°F and
160°F (60°F and 120°F for model L1170-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 accu-
rate temperature control to the requirements of ASSE 1017* across
the rated flow range.
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 1170-M2 and L1170-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, (-QC) Quick-Connect or CPVC connections.
Features
• Bronze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*
Specifications
A Hot Water Temperature Control Valve shall be installed on water
heating equipment to provide tempered water to supply piping.
Valveshallhaveabronzebody,includeintegralcheckvalvesand
operate so the thermostat controls the cold and hot water ports.
The valve shall be provided with solder (-US), threaded (-UT), PEX,
(-QC) Quick-Connect or CPVC connections. Valve shall be ASSE
Standard 1017* Listed. Valve shall be a Watts Regulator Company
1170-M2 or L1170-M2.
*ASSE 1017 listing is for valves used in hot water source applications.
1170-US-M2
Minimum flow requirements to maintain
set temperature for Series 1170-M2
VALVE SIZE GPM
1
⁄2" – 1" .5
ASSE Standard 1017 Listed*
†WARNING
Watts Hot Water Temperature Control Valve Series 1170 are designed to be installed
at or near the boiler or water heater. They cannot be used by themselves for temper-
ing water temperatures at fixtures where ASSE Standard 1016 or ASSE Standard
1070 listed devices are required. To comply with ASSE Standard 1016 or ASSE
Standard 1070, listed devices such as Watts Series L111, USG or MMV should be
usedatfixturestopreventpossibleinjury.
Watts Hot Water Temperature Control Valve Series 1170 are not designed to com-
pensateforsystempressurefluctuations.Suchusemayresultinseverebodilyinjury
(i. e. scalding or chilling) and/or death.
When installing the Series 1170 valves in radiant heat applications, the components
of the radiant heat system must be of materials with a construction capable of with-
standingthehighlimitoutputtemperaturesoftheheatingboiler.Ifyouareuncertain
as to the product’s adaptability for your application, please consult an authorized
representative before installing or using the product.
1170-QC-M2
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.