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WATTS 3/4 LF100XL 125-210 ASME Section IV Temperature & Pressure Relief Valve - ASME Section IV Temperature & Pressure Relief Valves
WattsASME Section IV Temperature & Pressure Relief Valves

WATTS 3/4 LF100XL 125-210 ASME Section IV Temperature & Pressure Relief Valve

The WATTS Temperature and Pressure Relief Valve is an ASME Section IV temperature and pressure relief valve with a 3/4 in MNPT x 3/4 in FNPT connection size. Its body is constructed from copper silicon alloy, and the…

SKU 3G-OTH-437119

Also listed as: 34LF100XL125210 · 3 4 LF100XL 125 210 · 3-4-LF100XL-125-210

Brand
Watts
Item
3/4 LF100XL 125-210 ASME Section IV Temperature & Pressure Relief Valve
Category
ASME Section IV Temperature & Pressure Relief Valves
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

Watts
Manufacturer Part Number
3/4 LF100XL 125-210
Body Material
Copper Silicon Alloy
Connection Size
3/4 in x 3/4 in

Technical Documents

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Watts Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The WATTS Temperature and Pressure Relief Valve is an ASME Section IV temperature and pressure relief valve with a 3/4 in MNPT x 3/4 in FNPT connection size. Its body is constructed from copper silicon alloy, and the manufacturer part number is 3/4 LF100XL 125-210.

Frequently Asked Questions

What is a WATTS temperature and pressure relief valve used for?

A WATTS temperature and pressure relief valve protects water heaters and storage tanks from overpressure and overtemperature. It automatically opens to discharge water when pressure or temperature exceeds safe limits, preventing catastrophic failure. This ASME Section IV valve is suitable for commercial and industrial hot water systems.

What are the specifications of the WATTS 3/4 LF100XL 125-210 valve?

The WATTS 3/4 LF100XL 125-210 is an ASME Section IV temperature and pressure relief valve with a 3/4 in MNPT x 3/4 in FNPT connection size. Its body is made of copper silicon alloy. The manufacturer part number is 3/4 LF100XL 125-210, and it is designed for water heater and tank protection.

Where to buy a WATTS temperature and pressure relief valve worldwide?

3G Electric supplies the WATTS temperature and pressure relief valve worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for a quote on the 3/4 LF100XL 125-210 or other WATTS valve models.

How to install a WATTS temperature and pressure relief valve?

Install the WATTS valve in the tank's T&P port with the sensing element immersed in the top 6 in of water. Use thread sealant on the MNPT connection, orient the discharge pipe downward, and ensure no valve is placed between the relief valve and the tank. Follow local codes and manufacturer instructions.

Used in

Common applications for Watts
Industrial burner gas safety systems — Watts HF2000 filters with GF-series seal kits maintain clean, regulated gas supply to burner pilot and main flame controls
Commercial heating and boiler installations — Modular filter assemblies support preventive maintenance and component replacement without full system shutdown
Process gas delivery pipelines — DN25 through DN125 filter bodies accommodate varying flow rates and inlet pressures across manufacturing and chemical processes
Gas pressure regulation benches — Multi-stage Watts filter platforms integrate with pressure reducers and safety shutoff valves in test and calibration environments
Equipment retrofit and upgrade projects — Available connection sizes and seal kits enable adaptation of newer Watts components into legacy gas control systems
Planned maintenance and spare-parts inventory — Filter seal kits allow facilities to stock consumables in advance, reducing downtime during scheduled gas system servicing

Watts Products

3G Electric supplies Watts asme section iv temperature & pressure relief valves. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Cross-referenced by specification & description
This ASME Section IV temperature and pressure relief valve features a bronze body with 3/4 in MNPT x 3/4 in FNPT connections. It is designed to automatically relieve excess temperature or pressure in water heaters and storage tanks, helping prevent system failure in hydronic applications
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This ASME Section IV temperature and pressure relief valve features a bronze body with 3/4 in MNPT x 3/4 in FNPT connections. It is designed to automatically relieve excess temperature or pressure in water heaters and storage tanks, helping prevent system failure in hydronic applications
Brass-bodied temperature and pressure relief valve with 3/4 in male NPT inlet and 3/4 in female NPT outlet. ASME Section IV rated for use on water heaters and storage tanks to automatically relieve excess temperature or pressure
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Brass-bodied temperature and pressure relief valve with 3/4 in male NPT inlet and 3/4 in female NPT outlet. ASME Section IV rated for use on water heaters and storage tanks to automatically relieve excess temperature or pressure
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Brass temperature and pressure relief valve with 3/4 in MNPT inlet and 3/4 in FNPT outlet. ASME Section IV rated for use on hot water storage tanks and heating boilers to relieve excess temperature or pressure
This ASME Section IV temperature and pressure relief valve is designed for use on hot water storage tanks and boilers. It automatically opens to discharge water when internal temperature or pressure exceeds safe limits. The valve features a brass body with 3/4 in male NPT inlet and 3/4 in female NPT outlet connections
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This ASME Section IV temperature and pressure relief valve is designed for use on hot water storage tanks and boilers. It automatically opens to discharge water when internal temperature or pressure exceeds safe limits. The valve features a brass body with 3/4 in male NPT inlet and 3/4 in female NPT outlet connections
This Watts pressure relief valve is designed for hot water service in hydronic heating systems. It features a copper alloy body with 3/4 in MNPT x 3/4 in FNPT connections and a maximum operating pressure of 125 psi. Certified to ASME Section IV, it automatically opens at set pressure to protect boilers and water heaters from overpressure
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This Watts pressure relief valve is designed for hot water service in hydronic heating systems. It features a copper alloy body with 3/4 in MNPT x 3/4 in FNPT connections and a maximum operating pressure of 125 psi. Certified to ASME Section IV, it automatically opens at set pressure to protect boilers and water heaters from overpressure
WATTS Pressure Relief Valve: MNPT x FNPT, 1/2 in x 1/2 in, Copper Silicon Alloy, 3 1/2 in Overall Ht (MPN 1/2 LF53L-150)
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WATTS Pressure Relief Valve: MNPT x FNPT, 1/2 in x 1/2 in, Copper Silicon Alloy, 3 1/2 in Overall Ht (MPN 1/2 LF53L-150)

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This brass-bodied temperature and pressure relief valve has 3/4 in male NPT inlet and 3/4 in female NPT outlet connections. It is rated to ASME Section IV standards for overpressure and overtemperature protection in water heating systems, such as hot water tanks and boilers
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ASME Section IV temperature and pressure relief valve with 3/4 in MNPT x 3/4 in FNPT connections. Body constructed of copper silicon alloy. Automatically opens to discharge water when temperature or pressure exceeds safe limits, protecting water heaters and storage tanks
Copper silicon alloy body temperature and pressure relief valve with 3/4 in MNPT x 3/4 in FNPT connections. ASME Section IV rated for use on hot water storage tanks and boilers to automatically relieve excess temperature or pressure
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This ASME Section IV temperature and pressure relief valve is constructed with a copper silicon alloy body. It features a 3/4 in male NPT inlet and a 3/4 in female NPT outlet. Used as a safety device on hot water heating boilers and storage tanks to automatically relieve excess temperature or pressure
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This ASME Section IV temperature and pressure relief valve is constructed with a copper silicon alloy body and features 3/4 in male NPT inlet and 3/4 in female NPT outlet connections. It is designed to automatically relieve excess temperature or pressure in water heaters and storage tanks, helping prevent system failures in hydronic applications