Specification Sheet

Series LFN170
Hot Water Master Tempering Valves
Watts Series LFN170 hot water master tempering valves are
especially designed for use on larger hot water supply systems
for mixing hot and cold water for a variety of applications to
extend the hot water supply. This series uses paraffin-based
thermostat to sense and adjust outlet temperature. The LFN170s
feature Lead Free* construction to comply with Lead Free*
installation requirements.
Features
• Lead Free* brass body construction
• ASSE 1017 and IAPMO
CUPC Listed
• LFN170-M3 uses paraffin-based thermostat to sense and adjust
outlet temperature
• Dirt and lime resistant poppet and seat design
• Virtual shutoff if supply pressure fails
• Vandal-resistant locking mechanism to secure temperature setting
• Factory tested
Specifications
Maximum Operating Pressure 125psig (861 kPa)
Maximum Hot Water Temperature 200°F (93°C)
Minimum Hot Water 5°F (3°C) Above Set Point**
Supply Temperature
Temperature Adjustment Range*** 90 - 180°F (32 - 82°C)
Hot Water Inlet Temperature Range 120 - 180°F (42 - 82°C)
Cold Water Inlet Temperature Range 40 - 80°F (4 - 27°C)
Listing ASSE 1017, IAPMO CUPC
Approval Standards ASSE 1017, CSA B125.3
LFN170-M3
LFN170-M3 CSUT
For Commercial Applications
ES-LFN170-M3
LEAD FREE
*
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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.
NOTICE
Inquire with governing authorities for local installation requirements
The information contained herein is not intended to replace the full
product installation and safety information available or the experience
of a trained product installer. You are required to thoroughly read all
installation instructions and product safety information before begin-
ning the installation of this product.
NOTICE
Watts 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 such as Watts Series LFMMV, LFUSG, or LFL111
valves should be used at fixtures to prevent possible injury.
The Watts Hot Water Tempering Valves are designed to be
installed at or near the boiler or water heater. They are not
designed to compensate for system pressure fluctuations and
should not be used where ASSE standard 1016, 1069 or 1070
devices are required. These Watts valves should never be used
to provide “anti-scald” or “anti-chill” service.
WARNING
!
* The wetted surface of this product contacted by consumable
water contains less than 0.25% of lead by weight.
** With Equal Pressure
*** Low Limit cannot be less than the cold water temperature. For
best operation, hot water should be at least 5°F (3°C) above
desired set point.