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 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, 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 340, 342 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"
(152mm)
ES-LF40_LF240 0940 © 2009 Watts
USA: T: [phone] • F: [phone] • Watts.com
Canada: T: [phone] • F: [phone] • Watts.ca
Latin America: T: (52) 81-1001-8600 • Watts.com
MODEL
INLET X
OUTLET
THERMOSTAT
LENGTH (BELOW INLET THREAD) DIMENSIONS WEIGHT
CSA
TEMP. STEAM **ASME PRESSURE STEAM RATING BTU/HR
Height
(Less Thermostat)
Width Rating BTU/HR @75psi set pres. @100psi set pres. @125psi set pres. @150psi set pres.
in. in. in. in. lbs.
LF40L-3
3
⁄4 M x
3
⁄4 F 3 5
5
⁄8 2
5
⁄8 1
3
⁄4 180,000 777,600 997,600 1,217,600 1,437,600
LF40XL-5
3
⁄4 M x
3
⁄4 F 5 5
5
⁄8 2
5
⁄8 1
3
⁄4 205,000 777,600 997,600 1,217,600 1,437,600
LF40XL-8
3
⁄4 M x
3
⁄4 F 8 5
5
⁄8 2
5
⁄8 1
3
⁄4 205,000 777,600 997,600 1,217,600 1,437,600
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 2,134,000
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 2,134,000
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 2,134,000
*LFN240X-6 1F x 1F 6 6
5
⁄8 3
3
⁄8 2
3
⁄4 730,000 2,195,000 2,817,000 3,438,000 4,059,000
*Standardly 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.
†LL40XL and LLL40XL valves with extended inlet shanks should be used for water heaters that have extra thick insulation, Ask for ES-LL/LLL-40XL.
Temperature and Pressure Relief Valves should be
inspected AT LEAST ONCE EVERY THREE 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, rendering the valve inop-
erative. 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 assure
continuing safety.
CAUTION
!