Submittal Sheet

M ax. 6"
I nsulatio n
D ischarg
e
Line
Discharge Line
Cold
Hot
T&P Relief
Valve
Max.
6"
Insulation
Max. 6"
(152mm)
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)
General Recommendations
For gas, electric or oil-fired storage water heaters between 180,000 to 205,000 BTU/Hr. rating: Use 3⁄4" (20mm) Series 40 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 500,000 BTU/Hr. rating and for compliance with applicable water heater label-
ing requirements: Use 1" (25mm) 40 Series tested under ANSI Z21.22 with ratings as certified and listed by CSA.
For the full range of high capacity temperature and pressure relief valves Series LF40, LF140, LF240, LF340 and LF342.
See ES-LF40, LF140, LF240, LF340.
MODEL INLET X
OUTLET
THERM
LENGTH
HEIGHT WIDTH WEIGHT CSA TEMP
STEAM
RATING
ASME @75 ASME @100 ASME @125 ASME @150
LFLL40XL 3/4M x 3/4F 3.5 6.66 2.64 1
1
⁄2 205,000 778,000 998,000 1,218,000 1,438,000
LFLLL40XL 3/4M x 3/4F 5 8.66 2.64 2 205,000 778,000 998,000 1,218,000 1,438,000
LFLL40XL 1M x 1F 3 7.71 2.81 2 500,000 1,155,000 1,481,000 1,808,000 2,135,000
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.
REINSPECTION OF T&P RELIEF VALVE: Temperature and Pressure Relief Valves should be reinspected AT LEAST ONCE
EVERY TWO TO FOUR YEARS by a licensed plumbing contractor or authorized inspection agency, to insure that the product has
not been affected by corrosive water conditions and to insure 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 inopera-
tive. Such conditions are not detectable unless the valve and its components are physically removed and inspected. Do not attempt
to conduct this inspection on your own. Contact your plumbing contractor for a reinspection to assure continuing safety. FAILURE
TO REINSPECT THIS VALVE AS DIRECTED COULD RESULT IN UNSAFE TEMPERATURE OR PRESSURE BUILD-UP WHICH
CAN RESULT IN SERIOUS INJURY OR DEATH AND/OR SEVERE PROPERTY DAMAGE.
A relief valve functions in an emergency by discharging water. Therefore, it is essential that a discharge line be piped from the valve
in order to carry the overflow to a safe place of disposal. The discharge line must be the same size as the valve outlet and must pitch
downward from the valve and terminate at least 6"(152mm) above the floor drain where any discharge will be clearly visible. For 100DT
discharge line consult your Watts agent.
WARNING
!
NOTICE
ES-LFLL/LLL-40XL 1834 © 2018 Watts
USA: T: [phone] • F: [phone] • Watts.com
Canada: T: [phone] • F: [phone] • Watts.ca
Latin America: T: (52) 81-1001-8600 • Watts.com