Specification Sheet

General Recommendations
†
For gas, electric or oil-fired storage water heaters between 180,000
to 205,000 BTU/Hr. rating: Use
3
⁄4" Series LF40, LF140 tested
under ANSI Z21.22 with ratings as certified and listed by CSA.
For gas or oil-fired storage water heaters between 205,000 and
730,000 BTU/Hr. rating and for compliance with applicable water
heater labeling requirements: Use 1" LF40, LF140, LFN240
Series tested under ANSI Z21.22 with ratings as certified
and listed by CSA.
For installations of gas or oil-fired hot water supply boilers over
730,000 BTU/Hr. output heating domestic water and for steam coil
storage water heaters: Use Series LF340, LF342 tested under
ANSI Z21.22 with rating as certified and listed by CSA.
Direct Side Tapping
FOR EXTERNAL FLUE HEATERS
Use extra length extension thermostat to extend into water
storage tank.
FOR INTERNAL FLUE HEATERS
Use short or standard length thermostat. Vertical discharge line must
be installed with its direction downward.
For Heaters with Direct Top Tapping
Use standard or extra length extension thermostat.
Max. 6"
(152 mm)
Pressure – Temperature
Temperature relief: 210°F (99°C)
Pressure range: 75 – 150psi (5.2 – 10.3 bar)
Standard setting: 75, 100, 125 and 150psi
(5.2, 6.9, 8.6 and 10.3 bar)
Standards
ASME Rated, ANSI Z21.22, Design
certified and listed by CSA, National Board of B&PVI to Section IV of
the ASME B&PV code and meet current FHA requirements and ANSI
Z21.22 in addition to Military Spec. MIL-V-136-12D, Type I.
ES-LF40_LF140_LFN240_LF340 1429 © 2014 Watts
USA: T: [phone] • F: [phone] • Watts.com
Canada: T: [phone] • F: [phone] • Watts.ca
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THERMOSTAT DIMENSIONS
MODEL INLET X OUTLET LENGTH (BELOW
INLET THREAD)
HEIGHT (LESS
THERMOSTAT)
WIDTH WEIGHT CSA TEMP.
STEAM
**ASME PRESSURE STEAM RATING BTU/HR
in. in. in. in. lbs. Rating BTU/HR @75psi set pres. @100psi set pres. @125psi set pres. @150psi set pres.
LF40L-3
3
⁄4 M x
3
⁄4 F 3 5
5
⁄8 2
5
⁄8 1
3
⁄4 180,000 778,000 998,000 1,218,000 1,438,000
LF40XL-5
3
⁄4 M x
3
⁄4 F 5 5
5
⁄8 2
5
⁄8 1
3
⁄4 205,000 778,000 998,000 1,218,000 1,438,000
LF40XL-8
3
⁄4 M x
3
⁄4 F 8 5
5
⁄8 2
5
⁄8 1
3
⁄4 205,000 778,000 998,000 1,218,000 1,438,000
LF140S-3
3
⁄4 F x
3
⁄4 F 3 5
5
⁄8 2
5
⁄8 1
3
⁄4 180,000 778,000 998,000 1,218,000 1,438,000
LF140X-5
3
⁄4 F x
3
⁄4 F 5 5
5
⁄8 2
5
⁄8 1
3
⁄4 205,000 778,000 998,000 1,218,000 1,438,000
LF140X-8
3
⁄4 F x
3
⁄4 F 8 5
5
⁄8 2
5
⁄8 1
3
⁄4 205,000 778,000 998,000 1,218,000 1,438,000
LF40L-2 1M x 1F 2 6
1
⁄4 2
3
⁄4 2
1
⁄4 450,000 1,155,000 1,481,000 1,808,000 2,135,000
LF40XL-4 1M x 1F 4 6
1
⁄4 2
3
⁄4 2
1
⁄4 500,000 1,155,000 1,481,000 1,808,000 2,135,000
LF40XL-7 1M x 1F 7 6
1
⁄4 2
3
⁄4 2
1
⁄4 500,000 1,155,000 1,481,000 1,808,000 2,135,000
*LF140S-3 1F x 1F 3 5
3
⁄4 3 2
1
⁄4 570,000 1,670,000 2,140,000 2,610,000 3,085,000
*LF140X-6 1F x 1F 6 5
3
⁄4 3 2
1
⁄4 670,000 1,670,000 2,140,000 2,610,000 3,085,000
*LF140X-9 1F x 1F 9 5
3
⁄4 3 2
1
⁄4 670,000 1,670,000 2,140,000 2,610,000 3,085,000
*LFN240X-6 1F x 1F 6 6
1
⁄4 3
1
⁄4 2
3
⁄4 730,000 2,195,000 2,817,000 3,438,000 4,059,000
*LFN240X-9 1F x 1F 9 6
1
⁄4 3
1
⁄4 2
3
⁄4 730,000 2,195,000 2,817,000 3,438,000 4,059,000
*LFN241X-5 1
1
⁄4 M x 1F 5 7
3
⁄8 3
1
⁄4 2
3
⁄4 730,000 2,195,000 2,817,000 3,438,000 4,059,000
*LFN241X-8 1
1
⁄4 M x 1F 8 7
3
⁄8 3
1
⁄4 2
3
⁄4 730,000 2,195,000 2,817,000 3,438,000 4,059,000
*LF340-3 1
1
⁄2 F x 1
1
⁄2 F 3 9
3
⁄4 4
1
⁄2 7 1,150,000 3,450,000 4,426,000 5,403,000 6,379,000
*LF340X-8 1
1
⁄2 F x 1
1
⁄2 F 8 9
3
⁄4 4
1
⁄2 8 1,150,000 3,450,000 4,426,000 5,403,000 6,379,000
*LF342-3 2 M x 1
1
⁄2 F 3 9
3
⁄4 4
1
⁄2 7 1,150,000 3,450,000 4,426,000 5,403,000 6,379,000
*LF342X-8 2 M x 1
1
⁄2 F 8 9
3
⁄4 4
1
⁄2 8 1,150,000 3,450,000 4,426,000 5,403,000 6,379,000
*Furnished with stainless steel thermostat tube. M = Male F = Female
**ASME capacities are steam pressure ratings and do not reflect the CSA temperature relieving capacity of the valves for selection purposes.
†LFLL40XL and LFLLL40XL valves with extended inlet shanks should be used for water heaters that have extra thick insulation, Ask for ES-LFLL/LLL40XL.
Temperature and Pressure Relief Valves should be inspected AT LEAST ONCE EVERY TWO TO FOUR YEARS, and
replaced, if necessary, by a licensed plumbing contractor or qualified service technician, to ensure that the product has
not been affected by corrosive water conditions and to ensure that the valve and discharge line have not been altered or
tampered with illegally. Certain naturally occurring conditions may corrode the valve or its components over time, render-
ing the valve inoperative. Such conditions can only be detected if the valve and its components are physically removed
and inspected. Do not attempt to conduct an inspection on your own. Contact your plumbing contractor for a reinspection
to ensure continuing safety.
WARNING
!