Submittal Sheet

Series LF210-5
Automatic Gas Shutoff Valves
Series LF210-5 automatic gas shutoff valves are positive-acting
energy shutoff for the emergency temperature protection of gas water
heaters. They are self-contained devices independent of all other
operating controls. They provide protection against overheating water
in the domestic hot water supply heating systems by automatically
shutting off the gas supply to the heater in the event that the water
temperature reaches 210°F (99°C). Series LF210-5 must be manu-
ally reset in order to resume heater service. This feature serves as a
warning of malfunctioning of the normal operating controls. Manual
resetting is easily done and does not require dismantling or replacing
of any part of the valve. See “Reset Button” feature. The LF210-5
features Lead Free* construction to comply with Lead Free*
installation requirements.
This gas shutoff differs from other contemporary design in that Watts
engineers have embodied the time tested Watts auto-thermatic
thermal actuator principle along with a snap-acting trip latch which
closes the valve at a definite controlled temperature.
Models LFL210-5 M2, LFLL210-5 M2 and LFLLL210-5 M2 feature
extended shanks for use with the new generation of water heaters
containing extra thick insulation.
Features
• Seating - Buna N disc to metal seating assures positive seal for
shutting off the gas to burner in the event of high water
temperature conditions
• Reset Button - After operating from high temperature, the gas
shutoff must be manually reset (opened). Pressing the reset button
in as far as it will go and then releasing, opens the valve and allows
gas to again flow to the burner
• Trip Latch Assembly - Snap acting latch releases the valve to closed
at a definite controlled temperature. Stainless steel spring seats
valve when trip latch releases valve to closed position
• Thermostat - Operates trip latch in response to water temperature.
Thermobulb, temperature sensitive portion, is at end of extension
tube for accurate response to tank temperature
Models
LF210-5 M2 Suitable for water heaters with up to
3
⁄4" of insulation
LFL210-5 M2 Suitable for water heaters with up to 2" of insulation
LFLL210-5 M2 Suitable for water heaters with up to 2
1
⁄2" of insulation
LFLLL210-5 M2 Suitable for water heaters with up to 3" of insulation
Specifications
Standard setting: 210°F (99°C)
Extension: Furnished with 5" thermostat extension only.
LF210-5 M2
LFL210-5 M2
LFLL210-5 M2
LFLLL210-5 M2
Thermostat
Reset Button
For Gas Water Heater Applications
ES-LF210-5
LEAD FREE
*
Job Name
–––––––––––––––––––––––––––––––––––––––––––
Contractor
––––––––––––––––––––––––––––––––––––––––––––
Job Location
–––––––––––––––––––––––––––––––––––––––––
Approval
–––––––––––––––––––––––––––––––––––––––––––––
Engineer
–––––––––––––––––––––––––––––––––––––––––––––
Contractor’s P.O. No.
––––––––––––––––––––––––––––––––––
Approval
–––––––––––––––––––––––––––––––––––––––––––––
Representative
––––––––––––––––––––––––––––––––––––––––
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.
*The wetted surface of this product contacted by consumable
water contains less than 0.25% of lead by weight.
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