Specification Sheet

ManualsBrandsWatts ManualsPlumbing40XL 1" Automatic Reseating Temperature and Pressure Relief Valve

The combined 2-in-1 Temperature & Pressure Relief Valve provides

the least expensive and proven means for protection against both

excessive temperature and pressure emergency conditions.

Fully automatic temperature and pressure relief protection for domes-

tic hot water supply tanks and heaters based on the latest ANSI

Z21.22 Listing requirements for temperature discharge capacity.

40XL with test lever and extension thermostat for installation in

hot water outlet within the allowable distance from the top of the

tank based on latest ANSI Z21.22. Sizes

⁄4" and 1".

40L with test lever and short thermostat for installation directly in

available tank tappings. Sizes

⁄4" and 1".

Series 140, N240 and 340 have the same basic body construction

and advanced design features as the Series 40 and are identical

to the Series 40 except for discharge capacity and size of inlet and

outlet connections. For complete specifications (including specifica-

tions for the Series 40) see other side. Sizes 1", 1

⁄4", 1

⁄2" and 2".

Features

• Bronze body construction

• Non-mechanical seat-to-disc alignment

• Thermostat is accurate and proven. Exclusively designed and

manufactured by Watts

• Tamper-resistant bonnet screws

• Series 40 and 140 feature a unique thermostat with a special

thermo-bonded coating

• Series 140 sizes 1" and above are standardly furnished with

stainless steel thermostat tube

• Series N240, 340 and 342 are furnished with stainless

steel thermostat

Specifications

Temperature & Pressure Relief Valves

Each hot water storage heater shall be equipped with an auto-

matic temperature and pressure relief valve to protect the heater

from excessive pressure and excessive temperature. The device

shall be certified as meeting the requirements of ASME low pres-

sure heating boiler code and ANSI Z21.22. The BTU discharge

capacity of the device shall be in excess of the BTU input rat-

ing of the heater. The T&P valve shall be a Watts Series 40, 140,

240 or 340.

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.

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)

Series 40L and 40XL

Series 140XL

Series N240X

Series 340

Series 40, 140, 240 & 340

Automatic Re-seating T&P Relief Valves

NOTICE

Inquire with governing authorities for local installation requirements

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.

For Commercial Water Heater Applications

ES-40-140-240-340

Job Name

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Contractor

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Job Location

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Approval

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Engineer

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Contractor’s P.O. No.

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Approval

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Representative

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Following installation, the valve lever MUST be operated

AT LEAST ONCE A YEAR to ensure that the water-ways are

clear. Certain naturally occurring mineral deposits may adhere to

the valve, rendering it inoperative. When manually operating the

lever, water will discharge and precautions must be taken to avoid

contact with hot water and to avoid water damage. BEFORE

operating lever, check to see that a discharge line is connected

to this valve directing the flow of hot water from the valve to a

proper place of disposal otherwise personal injury may result. If

no water flows, valve is inoperative. TURN OFF THE WATER

HEATER AND CALL A PLUMBER IMMEDIATELY.

This device is designed for emergency safety relief and shall not

be used as an operating control.

WARNING

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

Summary of content (2 pages)

PAGE 1
ES-40-140-240-340 For Commercial Water Heater Applications Job Name –––––––––––––––––––––––––––––––––––––––––––– Contractor ––––––––––––––––––––––––––––––––––––––––––––– Job Location –––––––––––––––––––––––––––––––––––––––––– Approval –––––––––––––––––––––––––––––––––––––––––––––– Engineer –––––––––––––––––––––––––––––––––––––––––––––– Contractor’s P.O. No.
PAGE 2
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 General Recommendations† For gas, electric or oil-fired storage water heaters between 180,000 to 205,000 BTU/Hr. rating: Use 3⁄4" Series 40, 140 tested under ANSI Z21.22 with ratings as certified and listed by CSA.